A pair of earplugs have a Noise Reduction Rating of 33dB and a Single Number Rating of 39dB. Would these both be able to block a sound of 36dB (regardless of frequency)? How can you be assured to...
If a sound is amplified does this mean the volume is increased? i ask this because i notice that if i amplify a alarm clock which is 112 dB and adjust the volume on a pair of speakers to 112dB it...
I have an alarm clock that emits a 112 decibel bleep when my decibel meter is placed directly over its very tiny speaker. I noticed that the noise attenuation is far,far greater that 6 dB for every...
I remember reading a binder of partworks, called the Book of Life published by the Marshall Cavendish Press(first edition 1969?) and I came across a description of a person described as a 'person...
