Difficulties arising with use of this measuring method are shown because of amplitude change in engine of up to 10.1 which can lead to aberrations of loud intensity of up to 20 db in certain frequency regions.
Acoustic testing of exhaust mufflers by means of loudspeaker system
Akustische Pruefung von Abgasschalldaempfern mittels Lautsprecherschalles
Automobiltechnische Zeitschrift ; 65 , n 9
1963
6 pages
Article (Journal)
German
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