Acoustics – Diaphragm and enclosure – With sound-absorbing means
Patent
1982-01-11
1984-10-02
Fuller, Benjamin R.
Acoustics
Diaphragm and enclosure
With sound-absorbing means
181153, 181155, 181199, 181DIG1, H05K 500
Patent
active
044742584
ABSTRACT:
An enclosure for a loudspeaker has a housing formed of sound reflecting material having opening dimensioned for mounting of a loudspeaker therein. A body of sound deadening material is disposed within the housing. The body of sound deadening material defines a bell-shaped chamber having a top and a bottom. The top of the bell-shaped chamber is located at the loudspeaker opening and the bottom of the bell-shaped enclosure is remote from the loudspeaker opening. The enclosure is preferably used in combination with a novel sinusoidal waveform energy reflector. The reflector has first and second surfaces each having an exponential cross-section and being reflective to the waveform energy. The first surface terminates in an apex pointing at a source of the waveform energy, such as a loudspeaker. The second surface intersects the first surface around a perimeter of the first surface. The loudspeaker enclosure produces sinusoidal sound waves more accurately and with less speaker fatigue, and the exponential reflector reflects those sound waves more accurately than in the prior art.
REFERENCES:
patent: 1628010 (1927-05-01), Taylor
patent: 1823705 (1931-05-01), Smith
patent: 1855837 (1932-04-01), King et al.
patent: 3642091 (1972-02-01), Nohara et al.
patent: 3819005 (1974-06-01), Westlund
patent: 3819006 (1974-06-01), Westlund
patent: 3912866 (1975-10-01), Fox
patent: 4281738 (1981-08-01), Jackson
patent: 4356880 (1982-11-01), Downs
Fuller Benjamin R.
Higgins Willis E.
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