What is the danger zone for noise pollution?
What is the danger zone for noise pollution? Noise above 70 dB over a prolonged period of time may start to damage your hearing. Loud noise above 120 dB can cause immediate harm to your ears.
Can humans hear 40 dB?
Generally, the range of human hearing spans 0 decibels (dB) to 120-130 dB. The human hearing range in Hz (hertz) usually includes sounds between 20 Hz and 20,000 Hz (20 kHz). While the upper limit for the average adult is 20,000 Hz, the highest-pitched sounds most people can hear fall between 15,000 to 17,000.