logSPL app at Mac App Store got 2.42k downloads last month. Estimated app cost $990

Description

This App is a full featured sound level meter, designed by a signal processing expert. It is iPhone/iPod/iPad compatible and adapts itself to the actual screen resolutions ("HD", "retina"). It consists in two parts: half top for basic features, half bottom for advanced ones (L95, %D, ...). Half top was thus designed to be extremely easy to use. Only two settings are requested: * select fast or slow update rate, which corresponds to 2 different integration periods * select the type of weighting: A or C or Z (Z meaning roughly: no filtering) These settings are saved when exiting the App. Some tips for weighting: * select A to evaluate the feeling of a person against a noise * select Z to balance an audio system Supports upside-down orientation. The min and max values are monitored and displayed in green in the upper view. An average value (Leq, LAeq, ...) is computed on top of this: the green triangle. Take care that this latter corresponds to the logarithm of the average power and not to the average of logarithm values, which is completely different. Integration time for this average value is: all time since start-up of the App or last reset. To reset these extreme and average values, touch the text named RESET. Bottom view is used to display an historical curve. A grid is visible, with lines every 10dB vertical and 10s horizontal. Half bottom now: * a real-time histogram is displayed on left side * it can compute L%: L95, L50, ... * it can make some dosemetering: for this you need to set threshold, criterion and exchange values. This is for advanced users due to the complexity of underlying concepts As for all sound-meter (at any price, hardware or software), you should calibrate it against a reference in order to achieve best accuracy. For this go to Mic. tab to add or remove a fixed offset to the measured values. Any question ? Click on the Facebook icon !

Estimates

Monthly Downloads > 2.42k

Est. Revenue ~ $990

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Devices

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Pricing by country

Country	Price
Canada	2.99 CAD
China	15 CNY
France	1.99 EUR
Germany	1.99 EUR
Italy	1.99 EUR
Netherlands	1.99 EUR
Portugal	1.99 EUR
Spain	1.99 EUR
Poland	2.29 EUR
UK	1.99 GBP
India	199 INR
Japan	300 JPY
Korea, Republic Of	3300 KRW
Poland	9.99 PLN
Russia	199 RUB
Turkey	99.99 TRY
USA	1.99 USD
Korea, Republic Of	2.19 USD
Ukraine	1.99 USD

Reviews

All reviews →

Indispensable !

Guillaumelou · 14 years ago · v1.3

Sonomètre précis, très simple a utiliser, que demander de plus ? Avec cette application votre iPhone devient un sonometre pratique pour régler un home cinema par exemple ! Je recommande !

Outil indispensable !

Jeffrey-78 · 14 years ago · v1.3

Dispose dune fonction absente de la plupart des applications équivalentes sur iPhone : La mesure du volume sonore moyen sur une période. Indispensable pour moi ! Bravo.

OUTSTANDING !!!!

MrGadget777 · 13 years ago

I do commercial audio work and run audio for our church. Typically I use a handheld meter to check db readings of the system. Ive tried numerous apps and none really did the trick. Some had great graphics, whistles ands bells, etc. etc. but as far as ease of use, accuracy and ongoing dependability this one beats the rest hands down. You can adjust the reading by comparing it with another instrument, but generally the comparison with a professional hand held and this app is probably + / = 3 db, if that. Its close enough for me, as I have a range I try to keep the church audio and this app consistently gives outstanding reliable readings. I run the app throughout the service and Im able to keep up with where the levels should be. Id have to say this everything I could ask for...and more, in an app. It allows me to have the Ipad sampling the sound continually, vs. having to keep restarting my handheld. The "professional" unit now stays in the case...and only gets used occasionally. (I normally dont write app reviews...but this one is well worth getting...very well designed!)

Amazing

SWeston7 · 11 years ago

Used this app to calibrate my 7.1 home theater to 75db on each speaker. Its super easy to use. I found it to be the best to use by setting it on slow and C.

Excellent Decibel Meter

Lahontan · 11 years ago

I am very impressed with the sensitivity and precision of this decibel app. It is easy to use and very responsive to changes in sound. I am using it to evaluate sound levels in relation to selection of HVAC and ventilation systems for a new commercial office building.