SPLnFFT Noise Meter
| Category | Price | Seller | Device |
|---|---|---|---|
| Utilities | $3.99 | Fabien Lefebvre | iPhone, iPad, iPod |
This soundmeter App is the only one for iOS recommended by the "Laborers' Health and Safety Fund of North America".
Here are extracts from other reviews:
"our favorite sound measurement app" SafetyAwakenings.com
"SPLnFFT is comprehensive, easy to use" TapeOp.com
You will find more reviews here: https://www.facebook.com/SPLnFFT
For daily use, a very simple interface displays the level of exposure: if orange or red, protect your ears !
Professional users will take advantage of a wide range of accurate and reliable measurements: Leq, peak, L10, L95, taktmaximal, frequency analysis, histogram, dosemetering, ... A&C weightings are compliant with ANSI® S1.42 standard. "468" refers to ITU-R 468-4
Some key information:
- you absolutely need to allow access to microphone to use this App
- screen rotation must be un-locked
- there are built-in help messages (speech bubble). Need more ? Contact us !: email, blog, Facebook,... Indeed we cannot answer to comments on iTunes
- do not expect to measure as low as 0dB(A) in a quiet room, for these 2 reasons: 30-130dB(A) is the standard usable range for sound level meters and anyway a standard quiet room is around 30dB(A) whereas a typical anechoic chamber is 10 to 20dB(A)
Top digital display is for measurement of sound power in 'slow' mode (averaged on 1s). Central analog display is for 'fast' mode (averaged on 1/8th s). But it can display 'slow' mode as well on request: just click on 'fast' label.
Peak and average values are displayed below and are holded until you touch the 'reset' label. The videos on Youtube reveal more details.
Bottom view is a real time FFT (frequency analysis). You will notice that predominant frequency and next one are highlighted. Their frequencies and relative power are displayed on the right. If your input signal is a pure tone then this App will lock on its frequency and display a very accurate result.
Green line is the result of a real time FFT done with 1024 points. Purple line is the averaged FFT (exponential filtering done on power of each frequency). Blue line is a copy of what the purple line was when the user froze the display the last time.
A test tone at 1kHz or a white noise or a pink noise can be generated and sent to right and/or left outputs (select the type you want in BEEP tab). This FFT view - more precisely an upsized version of it - can be exported as a picture in your own photo library, using the camera button (when display is frozen only). This picture can be exported in a mail as well, or to social networks (when available and configured).
The display can be flipped upside-down to ease reading: just rotate your iPhone while holding it vertically.
As for ALL sound meters (thus including this one and all others at any price), calibration is suggested if you want to reach extreme precision. This is enabled in this App thanks to a slider to apply some compensation and to three non volatile memories (choice to be made in MIC. tab). How to ? For calibration, you need and external reference, either a calibrated sound meter, or a calibrated noise source.
Note as well that the tiny embedded loudspeaker cannot reproduce extreme frequencies. Thus if you want to hear a real white or pink noise, you will need to use a quality headphone or HiFi system.
This App was designed seriously for our own needs, by a signal processing expert, and is regularly updated to maintain accuracy and reliability.
***** Any comment, any feedback ? Click on 'support' in iTunes: there is a blog for this. You can even contact us directly by email or through the dedicated FaceBook page *****
Reviews
Fantastic, Reliable, Useful
DavidRuess
I use this app several times a year and have used it for many years. It is a fantastic reliable and useful app. I highly recommend it. It’s very helpful when measuring speakers, general levels of noise if I’m in an audience, and I even use it with over the ear headphones (I just get the mic-end of the phone as close I can where my ears would reside within the earpiece to get a general idea so I protect my ears). If you don’t have a dedicated spl meter (or don’t carry one around with you) I recommend you get this. You won’t be disappointed. ?
My best app purchase
Eivind T
I use it all the time to understand more about the audio environment around me. I bought it several years ago. The author has all the time kept the app updated and current. Seems to be someone who cares deeply and really knows the domain.
The best
-odjbo-
Incredible feature set. Very customizable. Super reliable. Frequently updated. What more could you want?
Indispensable app
Gigabit1
This is a must-have for anyone who cares about sound, audiophiles, sound engineers and even concert goers. Use this to adjust tone controls on your car stereo or see how loud that club really is. With this app, I know for sure when to insert my earplugs. I am not associated with the developers.
Very Accurate
RCRX1800
I’ve used this app for several years, it’s extremely accurate. I use it mainly for live music inside a club venue. This app stays reliable and steady along with upgrades of phones. I’ve found zero inconsistencies. It does help me show guitar players that their stage amp is louder than the PA.
A useful app
xftyhbju
I keep it on my first page. I’ve had it several years. I have not noticed any bugs.
Loud Maintenance Noise Started
Seattle Rex
I fired up app to measure it while holding to toward the source, bring it down, look at the screen, there is a Nag asking me to leave a comment in here. Even though I have rating nags disabled in iOS. Nice guys, real nice. Thanks for putting your needs above your customer’s needs. Thanks for knowing your market. Cause that’s what people want to do monitoring noise. They really want to write ad copy in the App Store instead. I mean, why else would they launch the app, right? “But but it help us when people rate!” Sure and it helps me when people send me money. Can I spam your phone requesting donations from time to time? I mean, what’s the big deal? I won’t do it that often? Anyway, here’s the comment you wanted. You’re welcome.
Great noise meter, best in the App Store!
BP407
This app is great and the developer is responsive taking the time to respond to reviews and address concerns. I’ve used other dB meters and have found this to be the absolute best. Buy it, you’ll love it!
Enormously Useful
Weight meister
I love this app. It’s easy to use, informative without complexity and accurate. I use it a lot for wood shop measures, office and home. The frequency information helps analyze noise reduction options.
