Loudspeaker having apertured acoustic impedance frontal loading

Details Loudspeaker having apertured acoustic impedance frontal loading Loudspeaker having apertured acoustic impedance frontal loading

1981-04-20

1983-03-22

Hix, L. T.

Acoustics

Diaphragm and enclosure

Reflector baffle

H04R 700

Patent

active

043772196

ABSTRACT:
A direct radiating dynamic loudspeaker has an apertured impedance frontal loading element for improving its acoustic impedance. A planar sheet of nonrigid, fibrous air-permeable material has an apertured area and is positioned in front of the diaphragm of the loudspeaker. The sheet of air-permeable material is supported only at its periphery. A sheet of acoustically transparent material is bonded to the sheet of air-permeable material to cover the apertured area.

REFERENCES:
patent: 2672525 (1954-03-01), Pye
patent: 2840178 (1958-06-01), Boleslav
patent: 4058688 (1977-11-01), Nishimura et al.

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