4/14/2024 0 Comments Decibel scale safety![]() ![]() Many regulatory noise limits are specified in terms of A-weighted decibels, or dBA, which is adjusted so that low and very high frequencies of sound are given less weight - as perceived by human ears. 80 decibels is loud screaming from this level on, continuous sound exposure becomes unhealthy. The noise coming from most refrigerators are between 35 and 45 decibels. ![]() 40 decibels is a quiet yet not whispered conversation. The logarithmic decibel scale measures sound base on human hearing. 30 decibels are sounds of breathing and soft whispering. By definition, 0 dB is set at the reference sound pressure (20 micropascals at 1,000 Hz, as stated earlier). ![]() Sound levels damaging the cochlea are indicated here, regarding the European Legislation. An emphasis is made on the time limit exposure for each dangerous level. The decibel (dB) is the unit used to measure the intensity of a sound. The decibel scale is convenient because it compresses sound pressures important to human hearing into a manageable scale. ![]()
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