Sound Meter: SPL & noise meter is a completely free app designed to measure the sound levels in your environment. Noise pollution is a significant issue today. Understanding the noise pollution levels around you can help you make better decisions about your living environment and take measures to protect your hearing.

MEASURING THE SOUND INTENSITY

The app utilizes your mobile device's microphone to capture sound, then analyzes and measures the sound intensity in your surroundings, particularly in the area closest to the microphone. The unit used for measuring noise intensity is Decibel (dB).

NOISE ALERT

You will perform sound measurements over a specified period. Sound Meter will then calculate and display various noise levels: minimum noise level, maximum noise level, and average level during the measurement. Based on these metrics, the app will provide alerts if the noise levels exceed the permissible limit for human hearing.

TRACKING SOUND VARIATION

Information about the sound levels during the measurement will be shown directly on a graph. The histogram will display the sound intensity for each time interval, illustrating the sound variation from the start to the end of the measurement with a visual representation. This helps you determine whether the sound level is stable during the measurement.

DETAILS

After measuring the noise in your environment, the app will provide a reference chart of the noise levels of some common sounds for comparison. For example, the quietest is breathing (10dB), followed by a clock ticking (20dB), while medium sounds like a motorbike are 90dB, a subway is 100dB, and particularly loud sounds such as gunfire can reach up to 140dB.

HISTORY RECORD

Sound Meter keeps a history of your sound measurements, including the date, time, and specific noise index information, allowing you to make objective comparisons between different environments.

USER-FRIENDLY SUPPORT

The app's interface is straightforward to use. Its day-night mode allows for usage at any time without worrying about eye discomfort due to screen brightness. The app also requires minimal storage resources, making it suitable for all devices.

IMPORTANT NOTES

The readings obtained from the app may not be as accurate as those from specialized sound meters. They can be influenced by the phone's microphone or the positioning of the device during measurement, among other factors.