Timer Sound Detector

Nó sẽ phát hiện một số mức độ âm thanh và làm cho flash trên với bộ đếm thời gian.

It will detect some level of sound and make flash on with timer.

Timer Sound Detector is also known as sound level meter, decibel meter (dB meter), noise meter, sound pressure level meter and detector some level of meter that will make flash on with timer.

Levels of Noise In decibels (dB) according to American Academy of audiology :

140 dB - Gun shots, fireworks

130 dB - Jackhammers, Ambulance

120 dB - Jet planes taking off

110 dB - Concerts, Car horns

100 dB - Snowmobiles

90 dB - Power tools

80 dB - Alarm clocks

70 dB - Traffic

60 dB - Normal conversation

50 dB - Moderate rainfall

40 dB - Quiet library

30 dB - Whisper

20 dB - Leaves rusting

10 dB –Breathing