Description

Sound Level Analyzer

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"Sound Level Analyzer" is sound level meter and sound analysis tools for iPhone.

Available in variety of applications as the neighboring environmental noise measurement, audio system check, vehicle interior noise check, sound check of live events, and more.

"Sound Level Analyzer" has additional analysis modes, which are time graph, frequency realtime analyzer (RTA) and FFT analyzer.

It can be used to analyze the characteristics for the sound/noise source.



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The WHO has proven direct links between noise and health risks; tinnitus, sleep disturbance, stress, cognitive impairment, heart diseases and annoyance in general. Please check your environmental noise for your wellness.

"Sound Level Analyzer" has received the highest rating as a sound level meter app in the research paper of acoustic academic journal "Applied Acoustics". (Paper: ”Testing the accuracy of smartphones and sound level meter applications for measuring environmental noise”, Enda Murphy, Eoin A. King ; Applied Acoustics 106(2016)16-22.)


In addition, the high-end app "Sound Level Analyzer PRO" has more powerful sound / noise analysis function in addition to the sound level measurement function, so please consider using these apps for your advanced requirements.



Please to click the following link to download "Sound Level Analyzer" from App StoreTM. It will be open the download page on App StoreTM.


It will move to another site, download from Apple Store


Communications charges when connecting to the App Store will be borne by the customer.
iPhone, AirPlay is a trademark of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc.

Products Information

Version : 4.2
Release date : February 17, 2021. UTC
Size : 0.9 MB
Recommendation : Requires iOS 12.5 or later.
Category : Utilities, Life style

Features

"Sound Level Analyzer" has the following features:


Sound level measurement (dB) : Main (Leq)

- Leq (equivalent noise level), Lmin (minimum value), Lmax (maximum value), Lavg (time average equivalent noise level)

- Frequency weighting correction characteristics : A (for noise level meter), C (for sound level measurement), Z (no correction)

- Time weighting characteristics : Fast = 0.125 sec, Slow = 1.0 sec

- Display Range : 0 - 130dB


Power Spectrum (P.S) : View of frequency spectrum analysis

- Spectrum analyzer function : FFT analysis, 1/3-octave band response analysis.

- 1/3-octave band center frequency(Hz): 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200,
250, 315, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k, 20k

- FFT frequency range settings : 100Hz - 20kHz (FFT all) / 100Hz - 3kHz / 3k - 6kHz

- Measured value display function in 1/3 oct band response analysis. (OctVal)

- Power spectrum display function at the time of occurrence of Lmax. (display Max)


Calibration function : level correction value settings, -20 to +20dB / 0.1dB unit
Measurement timer function : 1 minute / 5 minutes / 10 minutes / 15 minutes / 20 minutes / 30 minutes / 1 hours
Snapshot : Save measurement display with time stamp to Photos.

Applications

"Sound Level Analyzer" can be used in applications such as the following:

Live Sound
Environmental noise measurement
Setting and Tuning of Audio system
Installation of Audio equipments
Installation of Car audio equipments
Architectural acoustics
Device management

In addition, the followings are examples of the magnitude of the sound level in the measurement of environmental noise.

130dB : Engine sound of Airplane
110dB : Horn of Car
100dB : Noise of passing train
90dB : In loud factory
80dB : In the train, Vacuum cleaner
70dB : Noisy office, Noisy street
60dB : Quiet Car, Normal conversation
50dB : Quiet office
40dB : In the library, Quiet residential area
30dB : Outskirts of midnight, Whisper
20dB : Sounds of rubbing leaves

Important initial settings (iOS permissions)

In order for this app to work properly, it is necessary to make the following initial settings related to the iOS system.


Microphone access permission setting

At the initial startup after installing the app, the iOS system asks for permission to access the built-in microphone. In this case, you need to enable access to "Microphone".

If you have not enabled this setting, this app can not work by privacy restrictions of the iOS system. Please enable the access permission on the iOS setting, "Settings > Privacy > Microphone".


Photos access permission setting

When the first time you save an image data with Snapshot, the iOS system asks for permission to access the "Photos" library. In this case, you need to enable access to "Photos".

If you have not enabled this setting, this app can not work by privacy restrictions of the iOS system. Please enable the access permission on the iOS setting, "Settings > Privacy > Photos".

Operation Mode

"Sound Level Analyzer PRO" has two types of measurement analysis modes. By tapping on each mode button, you can select one of the modes and display it. The function of each mode is as follows.


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[Measurement analysis mode]

MAIN (Leq) : Sound level measurement (dB)
P.S : Power Spectrum

"MAIN (Leq) mode" and "P.S mode" are also switched during measurement operation.

The access permission to the microphone will be confirmed from the iOS system at the first start-up. Please enable access to the microphone.

In addition, it will start up in MAIN (Leq) mode at the first boot-up.


MAIN (Leq) : Sound Level Measurement

"MAIN (Leq) mode" makes the sound level measurement in general. In this case, by applying the appropriate Frequency Correction, Time Correction, and Level Correction, you can be the best sound level measurement.

By tapping play button to start the sound level measurement, and it then pause by tapping it again.


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Sound level measurements are displayed measured values​of Equivalent continuous sound level (Leq), minimum value (Lmin), maximum value (Lmax) and Time average equivalent noise level (Lavg) in dB units. The Leq is also displayed as a bar graph.

It can be measured as parameters, Time weighting correction, Frequency weighting correction, and Level calibration, to set as follows:


[Time weighting correction]

It specifies the time constant of calculating the sound level. Please set in accordance with the occurrence tendency and type of sound source.

FAST : 0.125 sec (Default)
SLOW : 1.0 sec

[Frequency weighting correction]

It is a weighting filter that limits the frequency band of the input signal. Please set according to the measurement applications.

A : A correction - Noise measurement by general audibility correction (Default)
C : C correction - Sound pressure level measurement for wideband sounds and music
Z : Non correction

[Level Calibration]

You can specify the reference level in the offset range. Tap the "Setting" button, the calibration input window will appear. If you have a standard sound level meter, please use it to adjust the reference level.

Offset ranges : -20dB to +20dB in 0.1dB unit
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P.S : Power Spectrum

"P.S mode" displays frequency spectrum analysis in real time. Measurement is displayed by 1/3 octave band response and FFT analysis.

The 1/3 octave band analysis displays the signal response of the input signal's frequency spectrum in 1/3 octave and 24 band (100 Hz to 20 kHz). FFT analysis displays the FFT spectrum by Fast Fourier transform.


[FFT frequency range]

All : 100Hz - 20kHz
Scope 1 : 100Hz - 3kHz
Scope 2 : 3kHz - 6kHz

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By tapping "OctVal" button, it can display the measured values for each band of 1/3 octave band analysis in real-time.


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In addition, by tapping "Display Max" button, it can display the frequency spectrum characteristics at the moment when the maximum sound level "Lmax" has occurred.


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Snap Shot

If you tap "Snap" button, you can capture the measured image to Photos. It is possible in all modes.

At the first time, the confirmation of access to Photos is required once from iOS system when you press "Snap" button.


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Timer

If you tap "Setting" button, Measurement Timer settings is displayed. The time can be selected from a minimum of 1 minute to a maximum of 1 hours.

By tapping "Close" button, it will move to the previous measurement view.


Timer time:1 min / 5 min / 10 min / 15 min / 20 min / 30 min / 1 hour

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Product Information

By tapping "Setting" button, it is displayed the product information and function description.

By tapping "Close" button, it will return to the previous measurement view.


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Release Information

Sound Level Analyzer version 4.2 was released on February 17, 2021. UTC
Sound Level Analyzer version 4.1 was released on November 4, 2020. UTC
Sound Level Analyzer version 4.0 was released on May 18, 2020. UTC
Sound Level Analyzer version 3.1 was released on April 2, 2019. UTC
Sound Level Analyzer version 3.0 was released on November 13, 2018. UTC
Sound Level Analyzer version 2.3 was released on May 16, 2017. UTC
Sound Level Analyzer version 2.2 was released on March 24, 2017. UTC
Sound Level Analyzer version 2.1 was released on March 4, 2016. UTC
Sound Level Analyzer version 2.0 was released on December 12, 2015. UTC
Sound Level Analyzer version 1.3 was released on May 28, 2015. UTC
Sound Level Analyzer version 1.2 was released on March 24, 2015. UTC
Sound Level Analyzer version 1.1 was released on September 3, 2014. UTC
Sound Level Analyzer version 1.0 was released on June 10, 2014. UTC

Attention

The standard noise measurement range is 30-130 dBA, and even in a quiet room of the household, the measured value is approximately 30 dBA. In any silent environment, it will not be measured with very low noise levels, such as 0 dBA.
This app is adjusted the reference value for iPhone. However, the built-in microphone of your iPhone is likely to have a non-uniform gain. The more exact measurement should be calibrated using the absolute level calibration devices.

Request for review

Please send a review of your comments and requests for this app. We will use your review to improve our products. Thank you for your cooperation.


It will move to another site, download from Aplle Store Please send a review message for "Sound Level Analyzer".


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Contact us

Inquire about this app please from below!

Support contact : support_ap*toon-llc.com

(NOTE: Please change the star mark, * of this e-mail address to the at sign, @. The display of our support e-mail address has been changed to prevent spam. Please change to the correct address and send e-mail. )


Please contact us with the following details if you have any requests or problems.

1. Application name
2. Device model
3. iOS version
4. Country you live
5. Details about your requests or problems.

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