Description

Application "Sound Meter HQ" calculates soundlevel (noise level) of surroundings with the help of built-inmicrophone. Result of the measurements are displayed in decibels onthe screen of you phone.

IMPORTANT:
This tool is not a professional device to measure decibels. It usesbuilt-in microphone, which was created to capture human's voice.Such a microphone isn't able to capture sounds above ~ 90-100dB.
Maximum value differs depending on kind of microphone you have.Additionally some devices are equipped with AGC (Automatic GainControl). This system can additionally disturb correct soundpressure level measurement.

Calculated value of noise level is displayed with the help ofindicator on the gauge. Range of measurements from environment isbetween 0-140 dB. Besides current measurement the applicationdisplays also minimum and maximum level of the sound.
You can clear minimum and maximum measurements any time by using"Reset" button.
Additionally the application displays noise power in descriptiveway. Available descriptive sound thresholds:
10 dB - Breathing
20 dB - Rustling leaves
30 dB – Whisper
40 dB – Quiet library
50 dB – Moderate rainfall
60 dB – Normal conversation
70 dB – Vacuum cleaner
80 dB – Food blender
90 dB – Power tools
100 dB – Motorcycle
110 dB – Rock concert
120 dB – Chain saw
130 dB – Jet takeoff (100 m. away)
140 dB – Shotgun

Program calibration:
If you have an access to professional sound pressure level (SPL)measurements device you can use it for calibrating the application.Check current dB reading on scientific measurement device and withthe help of calibration menu (calibration icon under MAX value) setthe same value using +,- buttons.

Features of application:
- dB level presented on the gauge and in the descriptive way
- quick reaction on sound level change
- possibility of calibration the result according to professionaldevice.
- minimum and maximum measurements levels.