What is LCpeak dB?

The C-weighted Peak measurement is usually expressed as LCpeak in dB(C). The LCpeak is used for occupational noise measurement where loud bangs are present. The Peak is not usually used for environmental noise measurement and is useless when any wind is present.

What is LMIN in noise?

Lmin is the lowest time-weighted sound level measured by the meter over a given period of time (the minimum of the output of the time weighted sound level equation above). Just like for Lmax, the value is based on the time weighted sound level in dB. The time constant used can be fast or slow.

What is maximum sound level?

Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. 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.

What is the difference between 10 decibels and 20 decibels?

A 20 dB sound is 10 times louder than a 10 dB sound. The level of noise in a quiet bedroom, 30 dB, is 100 times louder than 10 dB.

What is LCeq?

C-A The LCeq-LAeq value over a measurement period. Commonly used in determining the most appropriate hearing protection using the HML method. Criterion Level or CL The maximum Leq sound level allowed for an 8-hour period and corresponds to the 100\% noise dose value. Used for calculating \% Dose and Estimated \% Dose.

What is LAeq dB?

LAeq,16h (UK Government Environmental Noise Definition) : the equivalent continuous sound level in dB(A) that, over the period 07:00-23:00 hours, contains the same sound energy as the actual fluctuating sound that occurred in that period.

What is LAF dB?

An LAF measurement (green line) will take approximately 0.6 seconds (attack time) to reach 80 dB and just under 1 second (decay time) to drop back down to 50 dB. An LAS measurement (yellow line) is slower to react. It will take approximately 5 seconds to reach 80 dB and around 6 seconds to drop back down to 50 dB.

What does LA90 mean?

LA90 means the A-weighted sound pressure level that is exceeded for 90 per cent of the time interval considered.

What is LA90?

LA90 : A-weighted, sound level just exceeded for 90\% of the measurement period and calculated by statistical analysis. LA10 and LA90 are extensively used for rating traffic noise and background noise respectively. The measurement period should also be stated.

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