Moving voice coil transducer with diaphragm having concentric se

Details Moving voice coil transducer with diaphragm having concentric se Moving voice coil transducer with diaphragm having concentric se

1978-01-27

1979-03-27

Stellar, George G.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181165, 181173, H04R 712, H04R 902

Patent

active

041467566

ABSTRACT:
An electroacoustic transducer in which a diaphragm of a loudspeaker for converting an electrical signal into an acoustic signal comprises a lower section and an upper section thereof which are split axially of a center pole of a magnetic circuit. The lower section of the diaphragm has a concave-curved surface such as an exponential-curved surface while the upper section of the diaphragm has a parabolically-curved surface. A roll is provided at the joint area of the upper and lower sections of the diaphragm. In this manner, a high-band resonance frequency of the loudspeaker is raised to a high frequency and Q of high-band resonance is lowered to broaden a reproduction frequency range of the loudspeaker.

REFERENCES:
patent: 1815987 (1931-07-01), Peterson
patent: 1876831 (1932-09-01), Ballantine

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