Are you worried that prolonged exposure to a noisy environment might damage your hearing? This tool captures environmental sounds in real time via your browser's microphone. Utilizing the Web Audio API, it calculates sound pressure levels and performs frequency analysis to output noise level data in decibels (dB(A)). It also provides an audio spectrogram to visually display noise components, helping users scientifically evaluate environmental noise pollution.
Q: Are the measurement results the same on mobile phones and computers?
A: No. Hardware differences in device microphones will cause measurement deviations. It is recommended to use the same device for comparative monitoring.
Q: How do I know if the noise level is too high?
A: According to WHO standards, continuous indoor noise exceeding 55 decibels during the day requires attention, and it should be below 45 decibels at night.
Before measuring, ensure the microphone is not physically obstructed. Result accuracy is affected by device hardware; for professional applications, it is recommended to use an acoustic calibrator. Avoid using the tool in environments with strong electromagnetic interference. Your browser's privacy settings must allow continuous microphone access.
For office environment monitoring, it is recommended to measure continuously for at least 15 minutes to cover intermittent noises like conversations and equipment operation. Typical input/output examples: The background noise of a quiet study is about 40 dB(A), while the instantaneous peak of keyboard typing can reach 65 dB(A), with the spectrogram showing a clear energy concentration in the 2-4 kHz frequency band.
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