Smartphone vs. Real Meters for Sound and Light Measurement?

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Жыл бұрын

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Are there inexpensive alternatives to light and sound meters? How about a multimeter that will measure both lux and decibels? Or what about your smartphone? In this video, I will test if they are any good...
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FULL MUSIC CREDITS
Time codes: 0:01 + 5:35
"Lightless Dawn" Kevin MacLeod (incompetech.com)
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Time codes: 0:57 + 8:25
"Adding the Sun" Kevin MacLeod (incompetech.com)
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Time codes: 2:52 + 10:54
"Perspectives" Kevin MacLeod (incompetech.com)
ISRC: USUAN1300027
Time codes: 7:45 + 8:07
"Newer Wave" Kevin MacLeod (incompetech.com)
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Time code: 9:54
"Peace of Mind" Kevin MacLeod (incompetech.com)
ISRC: USUAN1200099
All music above licensed under Creative Commons: By Attribution 3.0 License
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Time code: 5:03
Mix of two tracks:
1) The Shimmering by fran_ky (freesound.org/s/237363)
Licensed under Creative Commons 0 license
2) "Spacial Harvest" Kevin MacLeod (incompetech.com)
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#Smartphone #Multimeter #LightAndSound

Пікірлер: 421

@hudibaba Жыл бұрын

yes please make one one for the magnetic sensor

@MrManatres Жыл бұрын

In my country, argentina, I had seen some "qualified" technicians evaluate MRI installations only with the magnetic sensor on the phone hahaha

@Random_4400 Жыл бұрын

Yes

@franciscoj.a.5294 Жыл бұрын

@@MrManatres joderme, me imagino que no de dalde

@HighVoltageMadness Жыл бұрын

@@MrManatres lol

@MrManatres Жыл бұрын

@@franciscoj.a.5294 no me acuerdo el nombre del señor, pero son de radiofisica los que van a evaluar que las lineas de gauss no lleguen a las salas de espera en las clinicas o sectores asi

@LookingGlassUniverse Жыл бұрын

I find these side-by-side comparisons you do very helpful- the results are so surprising! Thank you for doing them, and I'd love to see more

@brainiac75 Жыл бұрын

Glad you like it. Guess there is some consumer information value for videos like this. Will have to try the magnetic sensors too :)

@m80116 Жыл бұрын

The trouble with dB meter apps I tried is that by default they all show different levels. I already had the app shown in the video before and was considering it as one of the most accurate (with no calibration). Probably despite the limited functionality the MM sound meter function might still be more reliable than apps which rely on internal hardware (fine if you have top smartphones, far less if you have 2nd and 3rd tier devices).

@pvic6959 Жыл бұрын

@@brainiac75 what app is this? Im not sure if it was mentioned and i missed it. I want to roughly measure the brightness of a flashlight i have but have nothing to measure with. It doesnt make sense for me to guy a meter for this one off thing

@TheExileFox Жыл бұрын

It should be noted however that the smartphone will do horribly with certain sounds. It's hard to describe accurately because i'm not entirely sure what frequencies this is happening at. I have never been able to catch it when carrying a proper sound meter. Quite annoying as it's quite common to run into these sounds at random times. If anyone has more details on these "difficult to record sounds" I would like to learn more about them.

@colourbasscolourbassweapon2135 10 ай бұрын

my subwoofer dual 18inch plays at of the level of 138db ngl@@brainiac75

@daringd3lta574 Жыл бұрын

I would love to see the smartphone compared to a real gaussmeter! That would be awesome!

@Eneicia2011 Жыл бұрын

Right???

@jennalove6755 Жыл бұрын

uhh technically they have one in them because of the digital compass

@daringd3lta574 Жыл бұрын

@@jennalove6755 Yes

@Ryan_Smyth Жыл бұрын

LOL! I was just thinking that! I have a 5% Gauss meter (the price difference for a 1% Gauss meter just isn't justifiable for hobbyists like me - they're crazy expensive) so I may just give it a shot & try. And God knows I have enough magnets! I spend way too much money on them. :D

@sashabagdasarow497 Жыл бұрын

@@Ryan_Smyth have you tried it?

@dvdcd Жыл бұрын

As a live audio engineer, having a spectrum analysis and SPL on your phone if you don't have anything else has seriously saved my butt a couple of times

@Yossus Жыл бұрын

In my Physics lessons, I occasionally use the phyphox app, which lets you capture the raw output of all the phone's sensors. It's quite amazing how accurate they can be, and definitely enough for schoolwork! I've had good experiences with the magnet sensors as well.

@ziginox Жыл бұрын

+1 for phyphox!

@TheSwaroopB Жыл бұрын

phyphox FTW!

@CrooningRevival365 Жыл бұрын

I always pull out that app when I’m in a tall elevator:p

@Cyberfly100 Жыл бұрын

+1 for phyphox! Check how the pressure changes by just moving the phone a few meters up or down. Or use the pressure sensor on an airplane to detect when the toilet is flushed. The accelerometer or noise spectrum analyzer can tell you the frequency of vibrations in your 3d printer. Great app.

@CnCDune Жыл бұрын

Would be interesting to see older phone models in similar tests if possible, not just current gen ones.

@brainiac75 Жыл бұрын

Will consider it. I have access to an S10+ and iPhone 7 too.

@CamcorderHomeVideos Жыл бұрын

@@brainiac75 Do you prefer iPhone, Samsung, or Pixel?

@rebane2001 Жыл бұрын

And a modern but very cheap phone would also be fun to throw into the test

@TeslaLiam Жыл бұрын

@@brainiac75 Yes, very good idea. I don't think a test with 10 years old phones would matter. Most people have there phone no longer than 2-4 years.

@TeslaLiam Жыл бұрын

@@rebane2001 Absolutely!

@theirisheditor Жыл бұрын

I'd love to see the sound meters tested at different volume levels. The main issue I found testing different Apps is they vary a lot above around 90dB. Generally the only time I open a sound meter App is when I'm at a loud venue, etc.

@mindtraveller100 Жыл бұрын

@@scorpioassmodeusgtx1811 Nothing beats a dedicated microphone.

@JoshuaPlays99 Жыл бұрын

I've always loved testing the sensors in my phone and have wondered how accurate they really are. This video was great to see and I would definitely like to see a video on the magnetic sensor

@neilg322 Жыл бұрын

Really interesting, i have wondered about the sensitivity of smartphone sound apps, especially as a sound level meter and where they max out, at concerts etc. A magnetic flux test would be good to see too.

@snowdaysrule Жыл бұрын

I really appreciate this one. I've been using the sensor capabilities of my smartphone lately and was wondering just how meaningful the output was.

@Guardian_Arias Жыл бұрын

The suite of sensor on some smartphones are absolutely amazing. I used to use the barometer on my old Galaxy S5 to help me troubleshoot Aircraft Cabin pressurization issues since the phone would often have a greater degree of accuracy than some older pure analog and pneumatic based pressurization systems.

@systemdrive7970 Жыл бұрын

Again, another amazing video. I really love these side by side comparison videos. Love your videos!

@Upquark0 Жыл бұрын

Of course we would like a video that checks out its magnetic capabilities, would be awesome! Also, I'm curious if your chemical element collection has grown so that you could make another attraction/repelling video? Really liked that series too. Best wishes for 2023!

@Da5idc Жыл бұрын

Excellent video - I really appreciate you taking the time to do these type of tests. It's really useful to see if apps are worth using

@alexwest1977 Жыл бұрын

Thank you for this comparison video. I wonder if it would be possible to "calibrate" some of these functions? If a smartphone app had an option for calibration and you had access to a high quality instrument to use as a calibration standard, that would be awesome! Please make a video for the magnetometer :)

@chstoney Жыл бұрын

I was working in a laboratory with sound-measuring equipment (SQuadriga 4) and I did a comparison of one of these sound-measuring apps back then too. And I was really surprised by how close the measurements of the phone were to it.

@jasonpatterson8091 Жыл бұрын

I do know that the pressure meter in a Samsung Galaxy is surprisingly sensitive, and the sensor menu is awesome. It can measure altitude changes of less than one meter based on atmospheric pressure, for instance, less than one pascal.

@AnalogWolf Жыл бұрын

Very well done, technically sound and you also do a great job breaking it down into terms that are easy to understand.

@guffyscotland9605 Жыл бұрын

You would not believe it but I was literally thinking about this a few hours ago! I got new headphones and know they're good to 106db (but obviously my ears aren't) and questioned if my phone would even be accurate enough to read that high reliably. Fantastic time to drop this video! EDIT: Just finished the video! I am absolutely astounded by the results, I cannot believe that the *very* multi-purpose smartphone held some level of competency in metering. Obviously I wouldn't trust my hearing or headphones with it, but the fact the range is so broad and remarkably accurate does give me confidence in knowing that I was actually being rather "scientific" in my methods where I relied on a specific Hz (tuning belts on a 3D printer) to get correct tension. This is a really valuable video!

@audiogek Жыл бұрын

Not surprised, I expected the smartphone to do as good as the dedicated meters, within 1% at least. Because smartphones are basically everywhere, that means also in the hands of people with calibrated tools. And over the years a lot of apps got calibrated with those dedicated meters for a lot of phones.

@JGnLAU8OAWF6 Жыл бұрын

Most sensors are digital and probably factory calibrated to some extent.

@mindtraveller100 Жыл бұрын

But any smartphone lacks a dedicated high quality microphone, and that means they´re useless measuring really loud volumes. 80 dB, or maybe 90, they can do. Above that, no...

@audiogek Жыл бұрын

@@mindtraveller100 True! Apps use to tell you that, but now that most apps are created for advertising money I'm guessing they don't do that anymore 😏

@mindtraveller100 Жыл бұрын

@@audiogek I tried 5 or 6 apps before, all of them only measuring up to around 80 dB. Recently i bought a cheap, and i really mean cheap, spl measuring tool. It reached 118 dB when i placed it a few inches from my studio speakers. And the price? 12 euros (around 12 dollars). Downside, only measures dBA not dBC, so no bass measuring. But for the price, i can´t complain, better than any app...

@DEtchells Жыл бұрын

Good video! Yes, I’d definitely like to see how good the magnetic field sensor is! (It’s probably only good for very low gauss levels though, as it’s only there to act as a compass :-/)

@GQuack Жыл бұрын

Let's see if the smartphone truly is *the* ultimate portable digital multitool that can do so much more and see if that magnetic sensor really is good. If it's good enough for the built-in compass app, it could be useful for amateur work. Keep it up, Brian! And here's to a much brighter 2023!

@chassy7072 Жыл бұрын

The amount of respect i have for your work for simply putting safety warnings in your videos is ridiculous. Good work friend

@l.mcmanus3983 Жыл бұрын

Very cool video. Neat to see the smart phone do that well for light. And that makes sense that is might purposefully be extra sensitive to infrared.

@cassini-studios88 Жыл бұрын

Hi Brian, merry Christmas and a happy new year~ :) I really like your videos! thanks for making them

@brainiac75 Жыл бұрын

Hi tjop. Same to you - hoping for a great 2023!

@cassini-studios88 Жыл бұрын

@@brainiac75 Thanks bro :)

@barrupa Жыл бұрын

From a quick google search, the TMD4912 light/proximity sensor manufactured by AMS seems to be an infrared based sensor and it's primary function is indeed to be a proximity sensor. It just so happens to be an optical light sensor specialized in sensing infrared light. Interesting to see the sensor choice by Samsung now knowing that it is indeed made to be used for both purposes.

@usy- Жыл бұрын

Nice video! Although I do believe you could have mentioned that the readings you obtained are accurate but only for your specific smartphone model (and maybe even unit!) and app used, as there can be great variance between smartphones and even the app used for the SPL reading, for example my phone shows about 10dB below my SPL meter at 1khz using the same app and same weighting, and as well as this the frequency response of the phones microphone is likely not flat, and therefore it wont measure all of the frequencies accurately. Oh and also, if you do want to perform this test on more phones, I have heard that the NIOSH app for iPhones is relatively "accurate", and ive checked my iphone 6s plus against my SPL meter and it was within a few decibels.

@atonduke7612 Жыл бұрын

I'm quite surprised with how well the phone did. I'd definitely like to see you test the magnetic sensor and other sensors (compass, gyroscope, g-sensor, ...) on your smartphone.

@Rararawr Жыл бұрын

The phone was closer than I expected. I have the same app on my phone to play around with. Going to an incredibly loud concert tomorrow so it'll be fun to see roughly how loud it really is

@simonmikkelsen Жыл бұрын

What is the name of the app?

@Rararawr Жыл бұрын

@@simonmikkelsen DecibelX

@fgbhrl4907 Жыл бұрын

You can get cellphones / tablets that have RGB-IR light meters in them -- I've worked on designing some of them. They are calibrated at the factory with light sources (at least, the products I worked on). The use of an RGB light sensor was to change display color temperature -- eg, it would be cool blue under flourescent lights, and warm under incandescent.

@whitehorsept Жыл бұрын

Yes please! Would be interesting to test the other smartphone sensors!

@vjay4297 Жыл бұрын

Multimeter is calibrated for use in handheld position, and directing the microphone to speaker may have boosted the response as it may be designed/calibrated to sound coming from top side.

@kartikahlawat413 Жыл бұрын

Yes I do wonder how good is the magnetometer on a cell phone and can only expect a detailed vedio from you............btw love watching your vedios ❤

@brainiac75 Жыл бұрын

Thanks - will need to find the limits of that sensor ;) More to come in 2023!

@CamcorderHomeVideos Жыл бұрын

@@brainiac75 Yay!

@user-zv2gr3tu1l Жыл бұрын

@@brainiac75 excited

@Uberhood Жыл бұрын

Hi Brianiac75. How did you find the light sensor service menu? I can't find it on my samsung service menu, only accelerometer and megnetometer for example. Thanks.

@Dukefazon Жыл бұрын

I regularly watch a guy who repairs all kinds of old computery stuff, sometimes CRT monitors and TVs and he uses an app to determine if the CRT is working by looking at a spectrum analizer on his phone. If the TV/monitor doesn't show a picture but the main circuit is working, he can see a peak in the monitor's/TV's operational frequency on his app, very interesting stuff.

@tommiller1315 Жыл бұрын

At the start, I was thinking there is another meter to add to my collection. (Anyway, I couldn't find it for sale here in the UK). Your results have put me off getting one anyway - thank you👍

@johnniewalker39 Жыл бұрын

Oh wow! Didn't see that coming (no pun intended) 😄 And yes, please do a vid on the phone magnetic sensor readings. Happy New Year!

@TheSwaroopB Жыл бұрын

This is a brilliant video!! Thanks for comparing. For anyone looking for the apps used in the video: Lux Light Meter Photometer Pro Decibel X - Pro Sound Meter (Can't share Play Store links since the comments get auto-deleted)

@ashyouknow7420 Жыл бұрын

Thank you bro!! I was really searching for a comment like this. I literally searched "app" in the finder of the browser lol

@dinitroacetylen Жыл бұрын

I hope you have a great new year with many more interesting discoveries!

@WilburJaywright Жыл бұрын

Midway, I want to say, kudos for giving excellent music credits. Thanks!

@BRUXXUS Жыл бұрын

Wow! I'd been curious about the sound level readings from apps for a long time. Pretty impressive! With that phone and app combo, anyways.

@sebbes333 Жыл бұрын

3:15 Something seams wrong with the leftmost meter, it is 10x lower than the other. Is it set in the wrong mode or something (like measuring "deci lux" or something strange like that (deci = 10))? The middle meter, I can't know if it says 1,06 lx or 106 lx? Or do they ACTUALLY measure that much differently in red light?

@HuskyMan77 Жыл бұрын

2:33 That's pretty interesting, on my phone (which is a Galaxy S8) it has both the light sensor and the proximity sensor separately. I also wonder if the light sensor being under the screen in the Galaxy S21+ affects the light readings a little bit, on my S8 it's on the top bezel.

@MeriaDuck Жыл бұрын

6:30 even if the pun was not intended, I laughed 🤣

@davpro1792 Жыл бұрын

Yes make a video about the Magnet sensor of your smartphone. Would be a very... interesting video!

@SQ-619 Жыл бұрын

I'm pretty lazy when I comes to writing comments, but wow, this really shocked me. A dedicated multimeter was actually beaten - in some categories - by a smartphone! Truly incredible. Great job my guy, I really learned a lot from you!

@mindtraveller100 Жыл бұрын

There is nothing "dedicated" about a multimeter measuring light or sound...

@Redstoner Жыл бұрын

Try the Photone app which uses the camera and a piece of paper to diffuse the light coming in

@wisteela Жыл бұрын

Yes, it will be very interesting to see what the magnetism meter is like.

@ronsku57 Жыл бұрын

Yes please make a video for the magnetic sensor on the phone!

@YTshashmeera Жыл бұрын

Yes! I'd love to see a video covering the magnetic sensor

@todayonthebench Жыл бұрын

Smart phone apps though have the big downside of having to rely on whatever sensors the manufacturer decided to put into the device. So it could vary a lot. However, I am not the slightest bit surprised over the spectrum being fairly spot on. The frequency references a phone has access to is fairly decent. Very few quartz oscillators are worse than 0.01% absolute accuracy. However, having access to time things from this oscillator isn't always available, but the audio chip itself will deliver its samples using that oscillator as its own reference. So one can be very certain that if the ADC provides 44800 samples/second that it will be fairly accurate. But exact audio amplitude will depend on a lot of things. Both the manufacturing tolerances of the microphone, amplifier, and ADC. So it could vary a lot. Especially since absolute amplitude isn't particularly important in audio applications regardless. (as long as it is nice and linear it doesn't matter if it has a different amount of amplification.) So I am surprised about the amplitude accuracy. But perhaps they factory calibrate this, otherwise I would expect a 2-10% accuracy there alone, perhaps your phone is just above average. The magnetic sensor part could be interesting to look at. But regardless. I personally prefer using dedicated measurement tools. Both because they are often more adapted to the job, but also because they can be more trusted. (especially as far as traceable calibration goes.)

@pennyether8433 Жыл бұрын

What's the name of the decibel meter smartphone app?

@cherokee131 2 ай бұрын

Decibel X

@ronsku57 Жыл бұрын

Very interesting topic!

@brainiac75 Жыл бұрын

Glad you like it! I am still surprised by the end result...

@volvo09 Жыл бұрын

Indeed! I had read about the accuracy of the light sensors in phones before when researching indoor gardening light measurements, and the tests I saw agreed with these results, for most uses the phone is just fine (with white light). I also learned how the proximity sensor worked!

@AlbertoPirrotta 9 ай бұрын

Great comparison !

@asilva781 Жыл бұрын

The a and c weightin I remember measures with mores sensitivity frequencies from 500Hz to 5000Hz. May be this is why you have very different measurements with extreme frequencies.

@Splarkszter Жыл бұрын

One thing to say, usually the expensive ones are accurate and don't drift much, and when they drift, some offer a life-time warranty for calibration.

@J0rdanXYZ Жыл бұрын

wow I was looking for an android app for sound levels a day before you uploaded. I'm worried about my hearing after working in a nightclub for 3 years without hearing protection and I was wanting to see how loud the sound was as sometimes it feels like my ear drum is about to burst with how crazy loud it is. Worst part is I'm over at the bar and the speakers are all pointed towards the dance floor so it is so much louder when standing on it compared to the bar area. (wear hearing protection)

@plrodgers 3 ай бұрын

Thanks for the video, this is quite interesting. Do add more discussion and videos on other sensors available in cellular phones.

@rexthewild1183 Жыл бұрын

To be honest… it makes sense that “ a free app from the phone” does such a good job, at least as a sound meter, since the phone has some good microphones that needs to make us sound as good as we can when speaking trough them, so an app just take the raw info from the mic and give it to us on a slick UI, what surprise me is that the proccessors on the phones can tell the frequencies of the sounds that are playing

@kithpendragon Жыл бұрын

I use "Physics Toolbox Sensor Suite Pro" to access my phone's sensors. There's a free version that I upgraded from because I liked the app so much. Both versions include access to the camera and microphones, proximity sensor and light meter, accelerometer and gravitometer, and the magnetic sensor. I'd love to see all the phone's sensors put against dedicated devices!

@Basement-Science Жыл бұрын

The main issue with the smartphones is that you never really know if your model is as good as another with any particular app. You'd have to test it against a reference meter for everything before you can trust it at all. Of course cheap dedicated tools can also have their issues. For example I have a lux meter that gives me pretty high readings when I shine some 400nm light on it - because the plastic in front of the sensor fluoresces and changes the color.

@Shocker99 Жыл бұрын

I would love you to test other smart phone tests. 💚

@GreenAppelPie Жыл бұрын

Now I want a 50w RGB. And I’m not surprised by audio meter in the phone. I played with the capability after using a guitar app, it really is impressive and accurate. I’ve also found aircraft interiors to limit sound to safe levels

@ashyouknow7420 Жыл бұрын

interesting. It's like seeing the world from a new perspective, isn't it?

@Kaamszz Жыл бұрын

Big yes for the magnetic test with the smartphone !!!!!

@JustPyroYT Жыл бұрын

Great Video! 👍 :D

@Andrew90046zero 10 ай бұрын

I’ve had an app that lets you use all the sensors, but for the amplitude, it says that it needs to be calibrated? But idk how i am supposed to do that if I don’t have a device that can’t already measure the db…

@glbernini0 Жыл бұрын

Which SPL app was used on the phone? Make & model of phone as well, we shouldn't assume all phones & apps are equally good, THANKS!

@CTcuber4K Жыл бұрын

I used the decibelX app at an airshow for a eurofighter typhoon, it gave a max reading of only around 110 decibels while the actual volume was definitely in the 130-140db range. I would think phones start to struggle when the sound gets really loud, but I can't confirm that as I only have that single test.

@christiangonzalez6945 Жыл бұрын

Considering that 110 decibels it's permanent damage zone at least its doing their job...

@mrwojna 3 ай бұрын

Thank you for doing this.

@NLind Жыл бұрын

Now watch the downloads for Decibel X and Photometer Pro skyrocket, great publicity for those apps! But I would also like to see a comparison for the magnetic sensor.

@asteria1065 Жыл бұрын

Truee!!!

@adnanmlivo5885 Жыл бұрын

I always thought that apps where way off. I guess not. Great video as always!

@JoshuaNicoll Жыл бұрын

Yes there should be an IR LED near the lux sensor as that's how the proximity sensor works, by reading how much reflected IR there, at least that's how it should work. There are other kinds but that's the IR lux meter one, common on smart phones.

@raihanlazuardi6632 Жыл бұрын

Yes! Please make a video about the magnetic sensor.

@davidquirk8097 Жыл бұрын

I'd be interested to see how the sound level meters compared with one of the high end sound level meters/analysers like the B&K type 2250.

@h7opolo Жыл бұрын

i find your exploration of this topic pertinent.

@MrTurbo_ Жыл бұрын

The thing with the db meter apps is that popular phones often get their own calibration profile making them fairly accurate, while less popular phones are often waaaaaay of, making them completely useless, also dedicated db meters often do way better at very loud sounds like 110+ db because the phone mic will clip

@ecodev15 Жыл бұрын

yes make the gaussmeter phone video ive always been surprised with the sensors in phones! samsungs older phones used to have heart rate monitors built in (mine does)

@vannhantran547 Жыл бұрын

Great comparison

@nefariousyawn Жыл бұрын

This is probably valuable information for people that like to build their own lights for aquariums, terrariums, indoor plant growth, etc. Lights marketed for any of these specific applications tend to be more expensive.

@johncoops6897 Жыл бұрын

Measurements for those applications cannot be made in Lux. That's because Lumens and Lux are weighted measurements that only apply to human vision.

@tramujarie 4 ай бұрын

Amazing video thank you very much.

@Bingliuau 4 ай бұрын

which app did you used on phone? i've install 2 and they give two different values (+-10) in the same condition

@Sckloste Жыл бұрын

I would love to see a video about the magnetic sensor. I always wonder if it can find stud screws in a wall or maybe even metal detect with it

@DustyTheDog Жыл бұрын

9:03 I can hear something happening here. It's very high pitched, but it's there. This is the reason I hated being around any CRT screens.

@pmate95 Жыл бұрын

I think the result depends on the phone too. I mean, cheaper phones could have worse results. I think it's worth to try different smartphones, and comparing them. Although it's very suprising, that these sensors in your phone are so accurate. Thank you for the video, it was very interesting!

@handle924 Жыл бұрын

which app did you use in the video? curious how well smartphones are at measuring low-frequency noise

@graealex Жыл бұрын

Halogen lamps emitting UVC? Seems highly unlikely. Filters are usually there to reflect some of the IR.

@finisek123 Жыл бұрын

Great video :)

@brainiac75 Жыл бұрын

Thanks - more to come in 2023!

@ThaVoodoo1 Жыл бұрын

@6:40 Am I correct in saying that the speaker output power should be at 1 Watt, then measured at a 1 Meter distance from the speaker.

@Random_4400 Жыл бұрын

That's very interesting, never knew a smartphone could be that accurate I have to say i am really surprised

@Aaron48219 Жыл бұрын

What sound meter app for the phone are you using?

@2010ngojo Жыл бұрын

I use my phone to detect strong magnetic fields/Flux at times. Very useful if you're trying to locate something in some piping. Now if only there's an ultrasonic or vibrational transducer attachments for these phones.

@syntaxerorr Жыл бұрын

Love your videos. I always wondered about smart phone audio spectrum analyzers apps. I can't believe how well it performed. I've recently started watching my music collection and surprised at how many songs basically have a 36db low pass filter at 16k. It just drops off on my mp3's. CD audio doesn't. I've started to save songs in flac. Not sure if it is worth it or not though. I tell my self I can hear the difference, but I think I'm lying to my self some times.

@jefersound_rs8289 Жыл бұрын

Please,what is the name of the application used on the smartphone?

@MrHQQX Жыл бұрын

I'd love if you made a video about turning a LUX meter into PAR meter. There were some projects online, and I'd be great help for hobbyists, since PAR meters are expensive af.

@Martin_Z555 Жыл бұрын

Brainiac75 could you tell me what device you used to get these light spectra on the computer? could really use something like that!

@DrJigglebones Жыл бұрын

It would be cool to see how well your phone acts as a gaussmeter, though do be careful as powerful magnets can damage electronics in certain situations.

@LGM4 Жыл бұрын

I've just measured the noise level of my induction stove and it's at 18,300 Hz and 90dB. I am concerned about the potential hearing damage that could occur at these levels. I would like to know for how long can I be exposed to this level of noise before it causes harm to my hearing. Until then, I have to go back to traditional cooking methods such as gas or slow cooking, which may be less convenient but it's better for my hearing health.

@addusernamehere 19 күн бұрын

Great scientific breakdown & comparative analysis. Thank you!!!

@motionsick Жыл бұрын

What probe and software are you using on the laptop?

@andyafk Жыл бұрын

from \my understanding, luminosity of lux were calculated by distance of the light and the front camera of the phone might be focus closer (focal length) to the light source then the light meter that you were using