at what point does sound damage hearing?
<answer> Exposure to a 90dB sound may not damage your hearing. <context> Brief exposure to a 90dB sound may not damage your hearing, but if your ears are exposed for extended durations, there is a definite risk. In fact, if you were to listen to the 90dB sound for three hours, you could cause the same damage as a 150dB, 30 second sound blast. 150dB is the average sound level of a shotgun!