Acoustics – Combined
Patent
1987-07-10
1990-05-15
Fuller, Benjamin R.
Acoustics
Combined
181144, 181150, 181153, 181155, 181156, 181199, 181296, 381 86, 381 90, 381154, H05K 500
Patent
active
049249622
ABSTRACT:
A sound reproducing apparatus for use in a vehicle having a speaker system constituted by at least one acoustic duct and a speaker unit disposed at a throat of the acoustic duct, an opening formed at the other end of the acoustic duct facing the passenger compartment of a vehicle. The apparatus is arranged such that, F0 and Fs are substantially equal to each other. Where Fs is the lowest frequency in a frequency range within which the imaginary part of the acoustic impedance at the sound radiating surface of the speaker system in the direction of the space within the passsenger compartment is zero and F0 is the low-range resonance frequency of the speaker system itself in the free space.
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Kumura Yoichi
Murata Kousaku
Nakama Yasutoshi
Obata Shuichi
Ogawa Michiko
Fuller Benjamin R.
Matsushita Electric - Industrial Co., Ltd.
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