Comm Diss 311-page6

Comm Diss 311-page6 -...

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Unformatted text preview: 55.ThenumberofdBcorrespondingtoapressureratioof40:1isapproximately32 dB. 56.Theintensityratiocorrespondingto60dBis100,000,000:1. 57.Ifeveryonesingsatthesamelevel,achoruswith100singersshouldmake10 moredBthanachoruswith5singers. 58.75dBSPLisequivalentto3.16x10^5watts/m2ofacousticintensity. 59.62dBSPL+68dBSPLisabout71dBSPL. 60.Aplotofanimpulseresponsewillhaveamplitudeontheyaxis(ordinant)and frequencyonthexaxis(abscissa). 61.Asystemwithalongimpulseresponsecan'tdomuchfiltering. 62.Onecouldcreatealinearsystemsuchthatasinewaveattheinputcouldbe transformedintoatrianglewaveattheoutput. 63.Animpulseresponseisamplitudeoverfrequency. 64.Onecouldcreatealinearsystemsuchthatasquarewaveattheinputcouldbe transformedintoatrianglewaveattheoutput. 65.Ifa200Hz50dBSPLsinewaveispassedthroughalinearsystem,andthe outputis20dBSPL,wecansaythatthesystemattenuates200Hzsinewavesby30 dB. 66.Forthesamesystemasabove,ifa200Hz,70dBSPLsoundispresentedatthe input,a20dBSPLsoundwillbepresentattheoutput. 67.Foralinearsystem,ifweknowtheresponseat200Hz,wealsoknowthe responseat400Hz. 68.Foralinearsystem,ifweknowtheresponseto50dBSPLinputswealsoknow theresponseto80dBSPLinputs. 69.Thefrequencyresponseisthedifferencebetweentheoutputofasystemand theinputtothesystemasafunctionofthefrequencyoftheinput. 70.Agraphoftheoutputlevelofasystemasafunctionofinputfrequencyiscalled aninputoutputfunction. ...
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This document was uploaded on 10/31/2011 for the course COM DIS 311 at UMass (Amherst).

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