Description - iOS app / Sound Level Analyzer

Sound Level Analyzer - Sound Level Measurement and Analysis Tools

icon_sla icon_sla_lite

"Sound Level Analyzer" is a sound level meter and real-time sound analysis tools for the iPhone.

It can be displayed a signal analysis at the same time as the sound level measurement, and is available in a variety of applications such as the neighboring environmental noise measuremet and sound check of Live events.

"Sound Level Analyzer Lite - Simple dB meter" is a free app that simplifies the measurement analysis function of the "Sound Level Analyzer", and supports sound level measurement function of MAIN mode.

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.

By version 2.2, the displayed lower frequency range has been expanded to 100Hz in 1/3 octave band mode and FFT mode.


* "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.)


sla sla lite


This app has our advanced digital signal processing algorithms to process acoustic frequency weighting filter and to measure real-time sound levels. The ANSI acoustic filters are A- and C-weighting. A-weighting is provided a roll off of low frequencies and high frequencies fairly steeply for human ears. C-weighting is provided a roll off of low and high frequencies slightly for music. The response time of all measurements can be also selected from ANSI Fast or Slow parameter.

"Sound Level Analyzer" also has three modes of signal analysis function, which are Time-domain Graph, 1/3 Octave band Frequency Analyzer, and FFT Analyzer, applying a weighting filter. Time-domain Graph is a sound level time chart and works by plotting the measured sound level for the last 20 seconds. Frequency Analyzer is based on our Realtime Audio Analyzer app "fo-Kannon", and is provided 1/3 Octave-band frequency spectrum analysis of input signals. FFT Analyzer is also provided the Fast Fourier Transform (FFT) Analysis of input signals.

In addition, if a detailed frequency analysis is required, it is recommended that you use our iPhone Frequency Spectrum Analyzer app "Audio Frequency Analyzer" or our iPad app "fo-Kannon".

"Sound Level Analyzer" comes pre-calibrated for the typical iPhone built-in mic, but you can adjust the calibration if you have a calibrated standard sound level meter.


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


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


It will move to another site, download from Aplle Store


Installation of iTunes is required.
Communications charges when connecting to the App Store will be borne by the customer.
* iPhone 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

# Product name : Sound Level Analyzer

Version : 2.3
Release date : May 16, 2017. UTC
Size : 0.5 MB
Recommendation : Requires iOS 10.3 or later.

# Product name : Sound Level Analyzer Lite

Version : 2.3
Release date : May 17, 2017. UTC
Size : 2.3 MB
Recommendation : Requires iOS 10.3 or later.

Category : Utilities, Life style

Features

# Common functionality

Sound Level measurement :

- Leq (equivalent continuous sound level),

- Leq ave (Long-term average equivalent sound level),

- Lmin (Minimum sound level of Leq),

- Lmax (Maximum sound level of Leq)

Display level dynamic range : 0 - 130dB
Supports frequency weighting filter : A, C, and Z (non-filter).
Supports Time weighting : 125ms (Fast), 1.0sec (Slow)
Frequency range: 20Hz - 20kHz
Calibration function : offset value from -20.0dB to 20.0dB (1dB-unit for "Sound Level Analyzer Lite")
Display resolution : 0.1dB
Peak measuremet range : around 110dB (by built-in mic perfomance)
Pause the screen during Measurement
Measurement duration : 20sec (Only for "Sound Level Analyzer Lite")

# Proprietary functionality of "Sound Level Analyzer"

Optimized for iPhone, Very compact code size.
Timer setting of measurement duration: 10sec - 1hour, continuous(automatic stop at maximum 24 hours)
Time-domain Graph function : Sound level graph chart (TIME mode)
1/3 octave-band Frequncy Analyzer function (1/3 Oct mode)
FFT Analyzer function (FFT mode)
Capture the measurement results with Time-stamp and GPS-location data to Camera-roll.

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

Operation Mode

The view of "Sound Level Analyzer" is divided into three areas. It is consisted of Operation Mode Selection area, Measurement Display area, and Measuring Operation area, from top to bottom.

"Sound Level Analyzer" has four modes of measurement operation. By tapping the select button, and then the corresponding Operation mode runs.

Depending on the operating mode, the contents of Measurement Display area are changed. The function of each Operation mode is as follows. In addition, it will start up in MAIN mode at application startup.

"Sound Level Analyzer Lite" has only MAIN mode for sound level measurement.

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

The confirmation of access to the GPS location data is required if you want to save the snapshot of measurement image data.


ss_mode

[Operation Mode]
MAIN : Sound Level Meter Mode (Default)
TIME : Sound Level time-domain Graph Mode
1/3Oct : 1/3 Octave-band Frequency Analyzer Mode
FFT : FFT Analyzer Mode

MAIN mode : Sound Level Measurement

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


sla_main slalite_c

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

It can be measured as parameters, Time weighting correction (Response), Frequency weighting correction (Weighting), and Level correction (Calibration), to set as follows:


[Time weighting correction : Response]

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

FAST : 125ms (Default)
SLOW : 1.0sec

[Frequency weighting correction : Weighting]

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

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

[Level correction : Calibration]

You can specify the reference level in the offset range. 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
ss_sla_calib

TIME mode:Time-domain Level Graph

TIME mode displays Time-domain Level Graph. It shows the sound level variation of 30 seconds the past time.

By tapping the play button to start the sound level measurement and displaying Time-domain Level Graph, and it then pause by tapping it again. Measurement parameter settings in MAIN mode will be reflected directly.


ss_sla_graph

1/3Oct mode : Frequency Analyzer

1/3Oct mode displays the measured frequency spectrum response in the built-in Frequency Analyzer. It shows frequency spectrum response of the input signal in 24 bands of 1/3 octave (Frequency range from 100Hz to 20kHz) in realtime.

By tapping the play button to start the sound level measurement and displaying frequency spectrum response, and it then pause by tapping it again. Measurement parameter settings in MAIN mode will be reflected directly.


ss_rta

FFT mode : FFT Analyzer

FFT mode displays the frequency analysis results of the Fast Fourier Transform (FFT) in the built-in FFT Analyzer.

By tapping the play button to start the sound level measurement and displaying FFT Analysis, and it then pause by tapping it again. Measurement parameter settings in MAIN mode will be reflected directly.


ss_fft

Screen Shot : Snap

If you tap "Snap" button in Measuring Operation area, you can capture the measured image to Camera roll. It will be saved in PNG format. It is possible in all modes, MAIN mode, TIME mode, 1/3Oct mode, and FFT mode.

In addition, the saved the image will be inserted the information of GPS location (longitude and latitude) and Time stamp (date and measured time data).

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

The confirmation of access to the GPS location data is required if you want to save the snapshot of measurement image data. If you disable the location information service, the location will be displayed as zero.


sla_snap

Measurement Timer

If you tap the Setting button "Setting" in Measuring Operation area, Measurement Timer settings is displayed

Select the measurement time, you can set the timer time. Please make sure that the timer time indication has been changed to the setting time.

The timer time can be selected continuous(----: automatic stop at maximum 24 hours) or timer time range from 10 seconds up to 60 minutes. The default is one minute.

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


sla_mt

Product Information

By tapping the Setting button "Setting" in Measuring Operation area, it is displayed the product information link. If you tap the "Support Site", Safari starts and you can see our support page. If you tap the "toon,llc Apps Information", you will see our App's information on the "App Store".

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


sla_info

Release Information

# Product name : Sound Level Analyzer

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


# Product name : Sound Level Analyzer Lite

Sound Level Analyzer Lite version 2.3 was released on May 17, 2017. UTC
Sound Level Analyzer Lite version 2.2 was released on June 2, 2016. UTC
Sound Level Analyzer Lite version 2.1 was released on March 4, 2016. UTC
Sound Level Analyzer Lite version 2.0 was released on December 21, 2015. UTC
Sound Level Analyzer Lite version 1.4 was released on December 4, 2015. UTC
Sound Level Analyzer Lite version 1.3 was released on March 24, 2015. UTC
Sound Level Analyzer Lite version 1.2 was released on September 3, 2014. UTC
Sound Level Analyzer Lite version 1.1.1 was released on July 13, 2014. UTC
Sound Level Analyzer Lite version 1.1 was released on June 23, 2014. UTC
Sound Level Analyzer Lite version 1.0 was released on June 10, 2014. UTC

Attention

At the time of the first access to Microphone and Photos after installing the app, you will be asked authorization to access them by the iOS system. If you have not enabled this setting, the app can not access them by privacy restrictions of the iOS system. Please enable the access permission on the iOS setting, "Settings > Privacy > Photos or Microphone".

The confirmation of access to the GPS location data is required if you want to save the snapshot of measurement image data.

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".


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


Please fill in your review by accessing from iTunes or iOS device.

Contact us

Inquire about this app please from below! Please contact us with the following details if you have any requests or problems.

support@toon-llc.com

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

Privacy Policy

Privacy Policy

icon_arrowReturn to Top