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Shallow the noise harm that talks about call center
From;  Author:Stand originally
From academic angle character, the background noise that the noise that word engine user contacts points to to word engine is received is harmonic the summation of mail message date. Actual in, the effect that the background noise of call center contacts a quantity always to noise is very small, the noise of ear Ma user exposes a quantity to be equal to the volume that ear Ma outputs. However, a bit must realise, that is the volume that call center increased for quits noise to communicate. Accordingly we should consider the total volume of office environment and call center in the round.
Audio size is with Db Spl the value undertakes calculative. The computational means of 3 kinds of types that evaluate the impact that noise reveals to be able to use the following introduction. When studying paroxysmal strong noise, often use peak value and mean effective value, when measuring long-term noise to expose however, use time weighted average.
Noise exposes: Db Spl or sound presses n
Sound presses n with decibel (Db Spl) computation. The fiducial n of acoustical pressing n is the upper limit threshold value of audition, size is 1khz, be equivalent to 0 Db Spl. Decibel scale is built with logarithm form, this means sound to press n every increase 6db, acoustical pressing can expand double. This reveals time with respect to the longest noise that is a proposal as noise decibel scale elevatory and rapid the reason that shorten: If sound presses n to be 85 Db Spl, of the proposal the longest expose time to be daily 8 hours, and when sound presses n to be 90db Spl, of the proposal the longest expose time to be 2.5 hours.
Ask referenced figure 1:
Threshold Of Normal Hearing: Receive threshold of audibility to be restricted normallyLeaves Rustling: Leaf froufrouLibrary: The libraryFace-to-face Conversation: Face-to-face talkTelephone Conversation: The phone chatsBusy Road: Busy highwayLoud Factory: The factory of strong noisePersonnel Stereo: Individual stereo radio cassette playerAngle Grinder: Horn to burnish machineNoisy Disco: Noisy discothequePneumatic Hammer: Rock Concert: Rock and roll is metPlain Taking Off: Chi of  of cover with a straw matRecommended Maximum Exposure Time According To Australian Hearing: The time of the biggest contact that center of Australian state hearing suggests
Implicit peak value is the value of a quantity of the biggest news that receiver can receive. Ear of international regulation person but limit of the greatest implicit peak value is susceptive 140db. At present the greatest implicit peak value all does not exceed Ma of all ear of big north Europe 122db, the bounds that sets under international greatly is worth.
Mean effective value
Normally the circumstance falls, the Rms that should pay close attention to noise to expose more is worth (mean effective value) , because mean effective value represents signal energy actually,this is. If sound is,exceed strong noise, we should use mean effective value and do not use peak value, measure the energy of sound wave and needing accordingly is not to measure volume of its peak value. The ear Ma that international sets is the biggest mean effective value is 118db,
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