Why do so many pieces of high-end audio exceed the limits of human hearing? Paul helps us understand.
Пікірлер: 149
@TexasScout3 жыл бұрын
The first time my hearing was tested, I was in the third grade (60 years ago). At that time I could hear up to 22000 hz. In my twenties I could still hear very high frequencies. I walked in to a Sears store back in the late 70s and I could physically hear all the "ultrasonic" burglar alarms in the store. I could point out ever one on the ceiling without looking up. Today at 67 years old, I can barely hear above 13000 hz. Rock and roll, loud cars/truck, shotguns, rifles and pistol have taken their toll. If I could give one piece of advice, PROTECT YOUR HEARING NOW. You will thank me later in life.
@s6g2k3 жыл бұрын
It depends on life goals. I'd like to hear above about 12k, but such is life at 57 for me. I'm pretty sure simple age and not mistreatment is one of the factors. In some ways, I live by the premise of "rode hard, put away wet." I enjoy how well my body has served me despite abuses of all sorts. I get it that not everyone has the same physiological forgiveness nor mindset. I currently play bass in a band and I get a kick out of that sonic reinforcement of the drummer and I really syncing up and having the feeling of a hammer on the side of my head.
@TexasScout3 жыл бұрын
@@s6g2k Yes, that's why my hearing is shot.
@s6g2k3 жыл бұрын
@@TexasScout 13K at 67? By all accounts you're doing fine.
@Mikexception3 жыл бұрын
@@s6g2k Just want also to point the same. In 70 I can hear max 13 kHz - in past I wasn't testing strength of my ears without need so I think at my age no much more for all can be available. But this in my opinion is not valid harm to listening. I have good sound memory and I having the same speakers I recognize in them the same sopranos quality as 50 years ago when I could hear also 19 kHz . That is because I still have tapes recorded with radio FM quality up to 10 kHz and other with limits up to 16 kHz. Perceived difference is almost same as in past. But deal is in speakers - comparing I did with the same speakers - new dome change too much to make any trusty comparison
@mysock351C3 жыл бұрын
At 67, if you have sensitivity of to 13kHz, you're doing very well. Most people's hearing will poop out at 8kHz at that age. At 41, I can only hear up to 15kHz, and sensitivity is totally gone after 17kHz.
@randykelly56923 жыл бұрын
Amir from audio science review made Paul's explanation incorrect.
@duroxkilo3 жыл бұрын
i'm sure mr Paul's stories are fascinating being in the industry for so long, but i'm also pretty sure his bias is towards selling stuffs more than 'clearing things up'
@andrewwebb46353 жыл бұрын
I don’t understand how this is still controversial. Surely it must be the easiest thing for a speaker / amp / headphone manufacturer or even a hobbyist to check once and for all whether we ‘hear’ very high frequencies in the super tweeter range? Just add a cutoff at, say, 20khz and find out whether it still sounds as good. The fact that so many comments below are about being able to hear very high tones strongly suggests to me that we all have this capability to some extent. It makes totally survival sense - survival of the fittest - to have very high hearing range since being aware of the very sharp click sounds would have been warning of the nearby presence of predators or prey. Why bring phase shift into it? Isn’t this just more commercial mumbo-jumbo?
@deondieleman82712 жыл бұрын
Hello Paul, there is an additional research on human perception of frequency. There is a Japanese paper released in 2000 about "Inaudible High-Frequency Sounds Effect Brain Activity". Interesting research. Also there is, with the development of DSD audio microphones reaching 100 khz, namely the Sanken CU-100. There are musical instruments that reach beyond 20 khz. Best, Deon.
@freone1113 жыл бұрын
20khZ And 20hz, those frequencies that are not heard give u a sense of space, room and ambience. People who tune know this.
@Bassotronics3 жыл бұрын
I can hear or sense down to 10Hz. I guess everyone is different.
@Cpk200013 жыл бұрын
@@Bassotronics No, you are not able to hear it.. also, hearing is a sense.. you are feeling it.
@Bassotronics3 жыл бұрын
@ *Keroo_82* If I’m not hearing it then what’s that sensation pushing on my ear drums? It’s still sound regardless. I am hearing it.
@Bassotronics3 жыл бұрын
@ *Taco* In my stomach is a tasty _taco_ .
@ThinkingBetter3 жыл бұрын
The human brain is quite amazing in terms of audio processing capabilities.
@graxjpg3 жыл бұрын
Right, it seems much more advanced than our minds would allow us to perceive directly.
@edgar96513 жыл бұрын
Thanks Paul. Sometimes I think you should use a white board (or something like that). Then you could draw the 3db points and that would clearly show that the signal slowly gets worse, like i.e. at the 1db points.
@ianbigsand73 жыл бұрын
And plot the frequency on a logarithmic scale to emphasise that our response to frequency isn't linear.
@mysock351C3 жыл бұрын
Of course, the real answer of why so much bandwidth is quite simple: Gain margins, and to a lesser extent, ensuring that any filtering needed can be done outside the audio band where you wont hear it. For the amplifier bandwidth, this is needed to ensure there is enough loop gain for the distortion mechanisms inherent in linear amplifiers to be dealt with. Since compensation is needed to ensure the amplifier is stable when there is sizable phase shifts present, the bandwidth and loop gain must be made quite high, especially since linear amplifiers inevitably have the open loop gain falling at a constant rate after only a few Hz. To ensure gain margins, the amplifiers normally have at least a MHz or so of useful open loop bandwidth. This is of no relevance to your auditory experience, but it is to the THD+N measurements and flatness of response across the audio band. In class-D and PCM audio, the situation is very different. There you need to stay away from the Nyquist frequency, so they often roll off quite abruptly above the audio band.
@Chrisspru2 жыл бұрын
ultrasonic and infrasonic vibrations can not be heared directly, but they can create vibrations in our body that we feel. some of those vibrations can also create resonant frequencies in the audible spectrum. the linearity and phase are speaker related effects that are also things we can perceive. additionaly, a more complete spectrum allows the driver to accelerate and decelerate more fluently/ naturaly, improving the sound of audible frequencies. (within the speakers limit of course. very loud infrasonic bass might approach dc, damaging the system. and very loud ultrasonic frequencies may excede the drivers inertia, creating induction heating. but that both needs extreme amplitudes)
@knobbshots3 жыл бұрын
We could tell the difference in phase shift resulting in what? I think I get the explanation but not sure what I would be listening for?? Someone approaching from the side, I get. Rolled off highs or lows, I get. But just to say “ we would notice the phase shift”...how? In what way would we notice? I apologize if it was explained and I’m just not getting it, just trying to learn. I hear other reviewers, etc , mentioning things happening in the time domain...is something sped up? Slowed down? A difference from left to right? Anyway, I do appreciate these videos very much, thx Paul
@knobbshots3 жыл бұрын
Thank you, that gives me a little reference to what I’d be hearing
@laurentzduba12983 жыл бұрын
I first encountered one of those pesky rat repellers that puts out 60,000 Hz at 120 dB SPL back in the mid 1990s and it really annoyed me. I'm turning 50 next year and yet I'm still annoyed by those rat repellers every time I get to within 10 feet of it.
@alfonsodelafreg2593 жыл бұрын
Are you sure someone isn't trying to get rid of you?
@geoff37s383 жыл бұрын
Paul is confused. The phase shift effect he describes relates to steep band limiting filters back in the audio chain., not speaker/headphone bandwidth.
@blekenbleu3 жыл бұрын
You are confused. Mass of real speaker diaphragms provokes lag between signals and responses, which delay represents greater phase shifts at higher frequencies. Similarly, efficiency of woofer electromagnet circuits change over frequencies, and phase changes occur around electromechanical resonances.
@geoff37s383 жыл бұрын
@@blekenbleu Yes, but what does this have to do with the ability to have a frequency response way above human hearing? A speaker that rolls off at 20KHz does not produce more phase shift than a speaker that goes up to 40KHz and may therefore not suffer IMD from ultrasonic noise.
@alfonsodelafreg2593 жыл бұрын
@@geoff37s38 Yes, it does.
@TessellationRow3 жыл бұрын
Only sane comment I’ve seen here so far
@10nut3 жыл бұрын
I'm from Bucharest also so....thank you!
@eugenepohjola2583 жыл бұрын
Howdy. The sine wave frequency response is a thing that belongs to the Hi-Fi domain. In the High End domain other parameters become important. One is burst response. That is how well the amp. can deliver the dynamics of, say, a kettle drum and uphold the power without buckling. Another is Slew Rate that tells how well the upper bands can ride upon high power low bands. To have a good Slew Rate means that the voice and the instruments sound natural on high volume. Slew Rate also delivers the sensation of presence.and directionality. A High End amp. should be able to reach, say, 65 kHz or higher. Regards.
@andysummers4853 жыл бұрын
The snake 0:07 bit Paul. yes careful his snake oils bite. better get some antiseptic for that.
@mysock351C3 жыл бұрын
I'd bet with those headphones claiming frequency response to 65kHz you could indeed hear them playing at that frequency, but only due to the inevitable resonances and IMD being produced. If you're speakers or headphones play pas the audio band, then its a clear sign of nonlinearity.
@duroxkilo3 жыл бұрын
ppl 'test their hearing' in uncontrolled environments and are under the impression that they can hear sounds that are in fact inaudible: most often that's because transducers produce harmonic distortions and that's what they actually hear. some play 10Hz on their subs and are convinced they can hear it. in fact the subs also produce 5Hz, 20Hz, 40Hz, etc when they are fed 10Hz. same goes for playing a 30kHz tone... fun fact: a spectrum analyzer shows clearly how much harmonic distortion a transducer produces for a given fq and amplitude. some subs produce the first or second harmonic distortion at a higher amplitude than the actual signal..
@jimhutton23903 жыл бұрын
You can hear sounds below 20Hz but even when you use a sine wave below you hear it as a series of thumps. At around 20 Hz it changes to a continuous tone no longer as a series of beats. It is pretty obvious that you can hear below 20Hz, drum beats are often between 1Hz and 6Hz.
@duroxkilo3 жыл бұрын
@@jimhutton2390 what makes it obvious? :} hear it produced by what? the membrane of a drum can't and doesn't vibrate at just one single frequency. if you were to hit a drum once every second that's not a 1Hz fq sound wave, it's just a 1Hz cycle
@grahamstrahle40103 жыл бұрын
Interesting, thank you Paul. Never heard it explained so clearly.
@The1973Umberto3 жыл бұрын
What about harmonics and the ability to reproduce complex sound waves as a combination of multiple order harmonics, having individual frequencies beyond the human hearing capability? I would have thought this to be an additional reason. Comments?
@jhutt80023 жыл бұрын
I'm highly skeptical of the harmonics explanation. In the real world harmonics only work one way: Upwards. ie. If you have tone at 1000 hz and other at 6000 hz, harmonics will only come into play above 6000 hz. So whatever effect ultrasonic harmonic smearing could make, is going to be above human hearing as well.
@johnholmes9123 жыл бұрын
yep frequency subtraction will produce sound in the audible range
@Bassotronics3 жыл бұрын
What a coincidence that Paul mentions 25 Hz below. Because for the past two days I’ve been having a discussion on Facebook of people saying that anything under 25 Hz cannot be heard and just makes mechanical noise from the speaker. That is untrue. Although yes a speaker has inherent noise and especially when the speaker unloads but in the case of my system, I can play complete down to 10Hz and I can hear or at least sense the Bass pulses in my ear drums. The amount of output that my system does in the infrasonics far outweighs the amount of “mechanical noise” that they claim. Many people have not had any experience with these frequencies because they are usually tuned higher than 35Hz and then they claim to know it all which is very annoying.
@duroxkilo3 жыл бұрын
what you're hearing are harmonic distortions above 20Hz... unless one has a special kind of 'medical condition' 10Hz is inaudible to humans. when your sub plays a 10Hz tone, it also plays distortions of 5Hz, 20Hz, 30, 40, etc, this can easily be seen w/ a spectrum analyzer. the distortions have different amplitudes but those harmonic distortions are always there.. in fact no transducer that can reproduce multiple frequencies is free of this type of distortion.
@Bassotronics3 жыл бұрын
@ *Durox Kilo* Im not sure about any of those “harmonics” you are talking about. The same way it sounds through my headphones is the same way it sounds in my vehicle. They are pure infrasonic tones the same way you would here a pure 50hz tone. There are no harmonics involved or other frequencies mixed. When I play a 17Hz tone for example, it’s a 17Hz tone, no added frequencies. If that were true, the music I make that specializes in infrasonics would be an utter mess. 🤷🏻♂️ 10 years with this discussion about infrasonics in various places and still going on... 😣
@duroxkilo3 жыл бұрын
@@Bassotronics what do you mean you're not sure? whatever pure sine wave you feed to an amp+transducer, the mic measured output is never a clean sine wave of the input frequency: it's a multitude of fqs PLUS the input sine wave.. all systems produce distortions.. harmonic distortion and intermodulation distortion are two kinds that would trick you into believing you can hear subsonic or ultrasonic fqs.
@Bassotronics3 жыл бұрын
@ *Douglas Blake* Oh ok. So you are talking about the total harmonic distortion about the amplifier itself and electronics. Makes sense in that case.
@Bassotronics3 жыл бұрын
@ *Durox Kilo* Well it would be pretty interesting that every single amplifier I have ever tried out and heard and connected to my enclosure which is tuned to about 15Hz sounds exactly the same. As I drop the frequency, the cycles per second my car windows shakes at matches the exact frequency being played. Even my computer produces the exact same frequencies with the tone generator as I play through my headphones. 🤷🏻♂️ But anyway thanks everybody for your valid input, I’m not going to take another 10 years explaining what I can actually hear. Toodles!
@traildoggy3 жыл бұрын
Always enjoy these vids although this high end equipment is just WAY out of my price range. I'd love it if you could do a video on consumer grade equipment with modest price points, say a basic 500 or 1000 dollar system. A similar breakdown on single components in that range would be nice too, i.e. how much to budget per component. For a lot of us even a grand is a pretty big commitment.
@s6g2k3 жыл бұрын
I'll grant Paul his niche. Not to mention he is the purveyor of his own equipment. There are other reviewers out there who do just that. Andrew Robinson, Steve Guttenberg are ones I pay attention to.
@dragonflyfab97033 жыл бұрын
Square wave is a compilation of all odd frequencies so 20k response can only reproduce a sign wave. Prolly only get a square wave up to 4k
@Bassotronics3 жыл бұрын
A square wave is not a compilation of odd or even frequencies; you are probably talking about white noise. A square a wave is just a regular sine wave but in the form of a square or cut up and down like a clipped wave form. And a triangle wave is just a sine wave in the form of a triangle. It’s not a combination of many frequencies but you can mix frequencies just like any other sounds you can mix and combine. This is done a lot in synthesizers.
@BB..........3 жыл бұрын
@@Bassotronics "A square a wave is just a regular sine wave but in the form of a square or cut up and down like a clipped wave form." Wrong, a square wave is a sine wave with an infinite number of odd-number harmonics.
@Bassotronics3 жыл бұрын
@ *BB* _Wrong!_ Go to an encyclopedia. “The square wave is a special case of a pulse wave which allows arbitrary durations at minimum and maximum. The ratio of the high period to the total period of a pulse wave is called the duty cycle. A true square wave has a 50% duty cycle (equal high and low periods).”
@BB..........3 жыл бұрын
@@Bassotronics Wrong yourself, clown. From Wikipedia: The ideal square wave contains only components of odd-integer harmonic frequencies (of the form 2π(2k − 1)f).
Unfortunately incorrect. Paul confuses possible effects of steep band limiting filters back in the audio chain with speaker/headphone frequency response.
@alfonsodelafreg2593 жыл бұрын
@@geoff37s38 No, it can happen in either spot.
@Mikexception3 жыл бұрын
Phase shifts occur even way upper and below the limits. Pushing limits do not cure what is damaged in other parts of frequencies Speakers or headphones can deliver 40kHz but important phase variations occur at much lower harmonics . In such speaker or phones even 12-16 kHz kHz may be masked and not noticeable by ear It is due to reflections of high tone sound and ball shape of dome . It may be easy calculated by difference of distance. Or it may be by deliberate tuning. The same 20 Hz may be covered by phase distortion in system acoustic resonance, which usually is i set not at lowest, or just resonate in headphones. My fellow has speakers they say capable of 40 kHz but in practice sound has highs deficiency so much that using them he states his ears already do not hear above 8kHz . I can hear 13 kHz but I also feel like 8kHz in his system which is shame because it is audiophile and good brand and as I said states 40 kHz. And still it may be true.
@Mikexception3 жыл бұрын
@Douglas Blake I agree - saying it delivers I meant that it can be measured with adequate microphone and presented as generally recognized data - of course it is not useful for ears but it eventually supports the honesty of such unusual tech-data. Glad to see that you confirm that even 20- 20k limits are expanded over hearing capabilities. I never found any improvement on range above 15kHz We are able to hear lower than 40 Hz It does not input more than say 5% to sound of most real music instruments - only eventually ads to amusement. Having two systems one delivering full from 25 Hz and second doing the same but with strong slope I like more the second one - lowest bass much distracts my attention to music. .
@Mikexception3 жыл бұрын
@Douglas Blake 35 Hz in piano is lowest strings resonances. . Much lower tones You can hear sometime in pop music - ex in "Angie" by Rolling Stones Also in Vangelis music, also in symphony - anyway it is big deal only for one who wants to admire over all just that impression . I was hunting for it very long and when achieved even 25Hz at equal level ..... turned my back in favor of complex impressions where lowest equal level starts at 40 Hz - I have no awareness of lacks in average reception .
@Mikexception3 жыл бұрын
@Douglas Blake I think 50 Hz is way too little. Hope "Angie" mentioned by me will clear it for you. Try Vangelis "Movement 4" from Soil Festivities and other from there too For noticing such low range You will need speakers producing min from 30 Hz and find right place in your room That is why it may sometime be useless.. I build already many years ago speakers which was "working" as low as 18 Hz -people liked it and purchased them from me due to that overwhelming sounds which they think (still) is fantastic. But it is of course false. I agree that natural instruments except church organ may be do not produce that range very noticeable. But it is in recording of surrounding artists happenings - it is not like sinus but mixed low harmonics making vibration of air in room BTW - I started to use generator when I was 20. Now I use CD with pro recorded frequencies because it is practical - no need to connect separate equipment and test covers also DA converter So I am familiar frequencies. .
@dougg10753 жыл бұрын
Always wondered about this.
@alexanderbelov68923 жыл бұрын
Fortunately phase shifting happens to both channels simultaneously, so humans ears cannot detect difference between two channels.
@riknos32893 жыл бұрын
Phase shifts are detectable by a single ear, and in fact have to be. The wavelength of say a 10khz signal in air is just under 1.4 inches (~3.5cm) which is significantly smaller than the distance between the ears. At these high frequencies it's almost guaranteed that the phase won't match between the ears, so temporal phase shifts (or changes in phase over time) are absolutely detectable by a single ear. This makes any instance of the phase relationship changing by frequency (and thus by note played in music) detectable by even a single ear.
@pauldavies60373 жыл бұрын
@@riknos3289 Yes also put a test tone into 1 or both speakers and move your head forward or left to right and the peaks and nulls are all over the place this is where panel speakers and phones have an advantage
@falcon0483 жыл бұрын
Makes sense. I always thought of it the same way as resolution. When you compact 20hz to 20Khz you get 44.1 resolution. When you move up to 48 or 88 or 96 or even 192 and higher, it unpacks to a range of hearing well beyond humans. It is because of this, that nay-sayers believe having a higher resolution is meaningless. The way I see it is, 44.1 unpacks like a step-ladder. You still get the frequencies you'd expect, but if you unpack 192 it's like filling in each step with more information so now your step ladder is more like a smooth incline. As I often like to say, "Are you suggesting that a recording of an acoustic guitar at 44.1 sounds just as good as being in the same room live when that person is playing the guitar? There is a reason why recording studios record at higher rates than 44.1 but MASTER down to 44.1. You WILL lose some information.
@volodumurkalunyak46513 жыл бұрын
If you allow you'r computer to do some math, 44.1 could be unpacked without stairstep ladder. Computer sound cards can execute following (unless you specifically disable): 1. Add samples withzero amplitude beetwen existing 2. Use a digitall brick wall low pass filter 3. Output either 88,2 176,4 or 352,8 into built-in DAC
@antoniosetz13543 жыл бұрын
@@volodumurkalunyak4651 You don´t need the computer to do that. Most DACs will oversample or use sigma-delta conversion.
@jimhutton23903 жыл бұрын
The max frequency you can get from 44.1k sample rate is 22.05k (see Nyquist) but in reality you need a low pass filter (see brick wall filter) so for most 44.1k the max frequency output is 20k max. 192k allows less expensive filters and still is generally limited to 20k output.
@volodumurkalunyak46513 жыл бұрын
@@antoniosetz1354 i never wrote CPU is doing all of that. Sound cards do execute that. This is an algoritm for upsampling within sound card or audio DAC (inner process for internal oversampling).
@freddyvejen7433 жыл бұрын
"so as the amplitude rolls of, the phase starts to shift" - Yes, that is what filters do. Does it also happen e.g. in a tweeter, when the frequency reaches where the tweeter is no longer linear?
@out-of-the-boxsystems30913 жыл бұрын
Yes, that is correct. Loudspeakers behave very much like minimum phase systems, for which amplitude and phase response are strictly correlated, see en.wikipedia.org/wiki/Minimum_phase#Relationship_of_magnitude_response_to_phase_response
@freddyvejen7433 жыл бұрын
@@out-of-the-boxsystems3091 , thank you for answering, but whoosh, that went over my head :-/ Does the phase shift on the tweeter, when the amplitude rolls off after the frequency exceeds the tweeter's linear reach?
@jimhutton23903 жыл бұрын
Actually the phase starts to shift well before the amplitude rolls off
@johndost30873 жыл бұрын
Paul (my middle name) : Can you explain overhead in reference to amplifier power, power supply rails etc. Thank you. John Paul in Michigan.
@johndost30873 жыл бұрын
@Douglas Blake Thank you Douglas. Sorry but I already knew this. I wanted Paul to explain it for my younger brother who is new to the audiophile world. Again thank you.
@JerryRutten3 жыл бұрын
A ruler flat amplitude and phase response of your electronics. And then come the speakers and the room. Oh boy!
@rickc6613 жыл бұрын
This is to me one of your best essays > To my decidedly non musician 72 year old not very good ears ( assume Utube spk. frequency response tests are somewhat accurate ) which quit @ 9 Khz.; explaining maybe there's useable stuff at twice that.
@einarbk8853 жыл бұрын
"we are very sensitive to thoes things" absolute nonsense.
@deafno3 жыл бұрын
Absolute shift no, relative shift yes. Amplifier can produce absolute shift.
@JoeDombroski3 жыл бұрын
My go to headphones are Sennheiser HD25's. They are rated at 16 - 22,000 Hz with .3% distortion. The HD25's are flat, super accurate and high fidelity. All I need. The 60kHz rating is more sell than science.
@andysummers4853 жыл бұрын
Your cats can easily hear 60HKz or 90KHz so no logic going there music instruments don't go that high unless one was made to do so but pointless cos its only gonna entertain dogs cats and bats.
@jimhutton23903 жыл бұрын
I worked for GTE Sylvania as a design engineer in an open room (~50 TVs), I can still hear the horizontal scan frequency (15,750 Hz), my wife can not, but when I was at college I tested another student who could hear out to near 100,000 Hz. He complained about the overhead ultrasonic sensors used to detect cars at stoplights especially in a convertible. Below 20 Hz you can hear fine but it sounds more like a series of clicks, at about 20 Hz it starts to sound like a tone.
@laurentzduba12983 жыл бұрын
I guess I'm not the only one annoyed by those rat repellers that operate at 60,000 Hz at 120 dB SPL and I'm turning 50 next year.
@duroxkilo3 жыл бұрын
i call BS
@jimhutton23903 жыл бұрын
The testing was done with a Crown DC300A feeding a JBL professional high frequency horn speaker (16 ohms) at a low power level (less than 0.5 watt). The bandwidth of this amplifier is down 1db at 100khz, and the distortion (THD and IM) are specified at less than 0.01% at 20khz. This amplifier has a very low noise floor. I don't recall the bandwidth of the speaker or its model number (I think the expected bandwidth was > 50khz). The sinewave generator was located > 50 feet away. He was located ~ 1 foot in front of the speaker and could not see the sine generator or its operator.
3 жыл бұрын
Oh my goodness! What a simple way to explain! Thank you Paul!!
@miro007ist3 жыл бұрын
I’m still struggling to understand what phase shift is exactly..
@graxjpg3 жыл бұрын
When the phase of a signal is shifted by a filter. It really is just a matter of the filter kind of slowing down whatever is being put through it.
@miro007ist3 жыл бұрын
@Douglas Blake interesting… it sort of does, yes. I really want to hear it now. I don’t have a DAC capable of high res, but I do have good headphones (AKG K361). If there is a way to demonstrate this phenomenon with my gear in 24 bit 48khz, please let me know.
@miro007ist3 жыл бұрын
@Douglas Blake Wow, thank you for such an informative reply! I think I finally get it now.
@xFunTomCZx3 жыл бұрын
You can find some out of phase tracks online. But I don't understand relationship between phase shift and frequency.. Why does a phase shift (or starts shifting as Paul said)?
@philipw70583 жыл бұрын
Where is my ordered power plant 🤷♂️
@zihotki3 жыл бұрын
Still not clear why, 18khz is the range of perfect young ears, usually it's much worse especially for older people. So instead of 18 it could easily be 12khz range. And we don't actually hear the phase, we hear the effect of phase on the frequency response, right? So it affects linearity of nearby frequencies the most, and since it's not within the range we hear, the effect on the frequencies we hear won't be, in most situations, distinguishable by human ear and brain because the higher frequencies have less power to make big influence. Please correct me if I'm wrong.
@PetraKann3 жыл бұрын
The phase shift explanation accounts for why sound gear designers extend the frequency output of their equipment beyond the hearing capabilities of the human ear. But the limits of our ears to pick up low and high frequencies remains.
@graxjpg3 жыл бұрын
The sensitivity of our ears to the audible frequencies far surpasses our ability to understand, I think that is why phase shift matters.
@PetraKann3 жыл бұрын
@@graxjpg that is post processing and interpretation by the brain. An illusion that is also dependent on the listener. Psycho-acoustics
@johnholmes9123 жыл бұрын
not quite; ultrasonic freqencies interact with audible frequencies to produce resultants within the audible range
@PetraKann3 жыл бұрын
@@johnholmes912 interesting. Sounds that are beyond the physical detection limits of our ears can still damage our hearing. Especially low frequencies. Various parts of the body, other than the ear, can also pick up sound frequencies - outside the normal hearing range, and processed differently by the nervous system and brain. Reminds me of this quote: “Because the right ear connects to the brain's left hemisphere, it's the dominant ear for processing rapidly changing sounds, and vice versa, the left ear dominates in processing prolonged tones.” Cheers, thanks for your response
@doylewayne39403 жыл бұрын
Phase shift... brilliant, makes sense, thanks Paul ;-))
@whoknowsmerida19102 жыл бұрын
no it doesn't. kzfaq.info/get/bejne/o9WIlK9-ucXTo2g.html&ab_channel=AudioScienceReview
@vilhjalmrwt3 жыл бұрын
Huh
@johnsweda29993 жыл бұрын
That's a shifty answer
@budgetaudiophilelife-long54613 жыл бұрын
🤗. BUT STILL A SENSITIVE ONE 😉😂😍😍😍
@graxjpg3 жыл бұрын
I honestly think this speaker is efficient, myself.
@geoff37s383 жыл бұрын
Total garbage. The average 35 year old male has 11 dB hearing loss at 8KHz and probably no hearing above 15KHz. Speaker and headphone manufacturers who claim response to ultrasonics are playing to the technically challenged customer. Be very careful testing your hearing by playing high frequency tones through your headphones. The test should only be done at normal volume. It is tempting to play a 15KHz tone or above and increase the volume until you think you can hear it. This is very dangerous and may cause hearing damage.
@graxjpg3 жыл бұрын
You seem technically challenged, old studio equipment like neve stuff which have supersonic frequency response was not designed for anyone but top level recording studios. Things with ultra high response are generally not marketed towards people who won’t know (or notice) the difference.
@duroxkilo3 жыл бұрын
@@graxjpg an amp or speaker can reproduce higher than audible frequencies but that's only because they want to cover 20kHz @ 0dB not because anyone can hear it. if you're over 20yo and you claim you can hear 20kHz you're a liar no need to test your hearing :}
@graxjpg3 жыл бұрын
@@duroxkilo there are people who can reliably pass hearing tests beyond 20k. They are rare, and I am not one of those people. The purpose of recording and reproducing frequencies above human hearing has implications within the audible spectrum. This does not take any intelligence to comprehend.
@duroxkilo3 жыл бұрын
@@graxjpg i don't really understand why it's so hard to accept that hearing aging is just as natural as gray hair. there are ppl who can hold their breath for 15min under water. some ppl can jump 5ft up in the air. some ppl see extra electromagnetic radiations. some indeed can hear above 20kHz. but all these are exceptions. when a company sells 35kHz super-tweeters what they assume is not that i'm one of the exceptions :}
@duroxkilo3 жыл бұрын
i have great hearing to the point that in some occasions it can be distracting but our hearing ages just as we are. it's natural, it doesn't make us garbage :} late 30s and i hear 15kHz like i used to hear 17kHz 10 yrs ago: barely audible :}
@ryanschipp85133 жыл бұрын
It involves sales.
@josefbuckland3 жыл бұрын
Mmm sensory reaction like our third ear on the back of our skull I kid you not check out Dave Rats video on the inner ear. That is detected my higher frequency’s fascinating stuff
@jordillach32223 жыл бұрын
Have you heard there is something called punctuation?
@josefbuckland3 жыл бұрын
@@jordillach3222 WUT? lol I get excited when I type and SIRI is not with me everywhere I go, I do apologise the colours distract me. Bless
@camillomacaluso79543 жыл бұрын
Paul addicted
@NaveenKumar-uh2gk3 жыл бұрын
This man is genius
@duroxkilo3 жыл бұрын
diversify your information sources man :}
@whoknowsmerida19102 жыл бұрын
no he's not. kzfaq.info/get/bejne/o9WIlK9-ucXTo2g.html&ab_channel=AudioScienceReview
@giannagiavelli50983 жыл бұрын
many of us still have hearing to 28khz and moreover can "sense" up to 32khz
@jordillach32223 жыл бұрын
Yeah, and the Earth is flat.
@Historia.Magistra.Vitae.3 жыл бұрын
@Gianna Giavelli: You have no clue what you are talking about.
@duroxkilo3 жыл бұрын
BS, it's that simple
@giannagiavelli50983 жыл бұрын
@@duroxkilo I have had formal hearing tests. What are you talking about?
@whoknowsmerida19102 жыл бұрын
@@giannagiavelli5098 hahahahhaa. you've had a formal hearing test that shows you can hear till 28 kHz. Wow. Wow. Wow. Please do share. I'm very curious to see this
@johnholmes9123 жыл бұрын
whch is why digital media such as cd sound so lifeless
@alfonsodelafreg2593 жыл бұрын
@Taco You don't hear 1s and 0s, you hear an analog signal. Simply, the music can be stored in the digital domain (1s and 0s) but must be transformed to the analog domain before you can hear it. It is during this transformation and how it is done where all the bad stuff happens. Yes, and it is a bit more complex than that.
@Historia.Magistra.Vitae.3 жыл бұрын
@John Holmes: You are not making any sense.
@Historia.Magistra.Vitae.3 жыл бұрын
@Taco : You have no clue what you are talking about.
@Historia.Magistra.Vitae.3 жыл бұрын
@Taco : Incorrect. You still have no clue what you are talking about.
@Historia.Magistra.Vitae.3 жыл бұрын
@Taco : Incorrect again. Digital will be analog after it has gone through the DAC. Every sound you hear is analog and so is everything that comes out of your audio equipment.