EVERYDAY SCIENCE

Detailed explanation-1: -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.

Detailed explanation-2: -120 – 140 decibels: Such as, a rock concert, auto racing, or a hammer pounding a nail. 125 – 155 decibels: Like, firecrackers or fireworks, or a jet engine. 170 – 190 decibels: For example, a shot gun blast or a rocket lift off.

Detailed explanation-3: -The effective distance of a 100 dB(A) sounder in a very noisy environment is 1.8m, the distance for a 120 dB(A) sounder is approx 18m (10 times the distance). Note: Alarm sounders that are too loud may be dangerous and cause panic, discomfort and make communication very difficult.

Detailed explanation-4: -Profound Hearing Loss People suffering from this degree of hearing loss cannot hear sounds softer than 90-120 dB. For those suffering from profound hearing loss, using a hearing aid is most often ineffective.

Detailed explanation-5: -By 100 decibels, the noise exposure limit drops to 15 minutes, and at 10 decibels more (110 dB), the risk exposure time plummets to just one minute. Exposure to sound levels for longer than that could result in permanent hearing loss.