Comm Diss 311-page10

Comm Diss 311-page10 -...

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Unformatted text preview: 32.Theamplitudespectrumofanaperiodicwaveappearsasaseriesofvertical linesbeginningatthefundamentalfrequency.(No,aperiodicwavesdonothave individualsinewavecomponents). 33.Thespectrumofawhitenoiseappearsasacontinuousspectrumwithequal amplitudeatallfrequencies.(Yep) 34.Thespectrumofapinknoiseappearsasacontinuousspectrumwithdecreasing amplitudeatarateof3dB/octave.(Yep) 35.Asthedurationofapulseisincreased,thespectrumsplattersmoretowardthe higherfrequencies.(No,thespectrumismoreconfinedtothelowfrequencies) 36.Ifasinglepulseis2msinduration,thanthezerosinthespectrumwilloccur every2000Hz.(No,thereciprocalof2msis500Hz). 37.Thespectrumofashorttoneiscenteredonthereciprocaloftheperiodbut splatterstowardlowerandhigherfrequencies.(True) 38.Aperiodicpulsetraininwhichthepulsesarespreadfurtherapartintimewill haveadenserspectrumthanoneinwhichthepulsesareclosertogetherintime. (Yep) 39.Aninfinitelyshortpulse(animpulse)hasanamplitudespectrumthatis perfectlyflat,likeawhitenoise.(Yep) 40.Forawhitenoise,thelevelofsoundateachfrequencyiscalledthespectrum level.(Yes) 41.Forceisexpressedinjoulesorergs.(No,dynesornewtons) 42.Pressureisexpressedinwatts.(Nodynes/cm2ornewtons/m2) 43.Powerisexpressedinjoulespersecondorergspersecond.(Yes) 44.Twojoulesofworkdonein2secondsis2watts.(No,2/2=1watt) 45.Intensityisforce/area.(No,powerperarea) 46.1gramofmassacceleratedat1cm/sec2isaforceof1dyne.(True) 47.0dBSPLmeansthatthereisnosound.(No) 48.Asoundwithapressureof2x105Pascalsis0dBSPL.(Yes) ...
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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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