Headphone of circumaural design

Details Headphone of circumaural design Headphone of circumaural design

1978-01-30

1979-06-19

Cooper, William C.

H04R 122

Patent

active

041587537

ABSTRACT:
The headphone includes a cup-shaped case forming the coupling space and this cup-shaped case, in use, engages the user's head and encloses the user's ear. At least one electroacoustic transducer is included in the cup-shaped case, and the case either is designed as an acoustic frictional resistance or as a supporting structure of such a resistance. The headphone is equipped with acoustic and/or electrical systems compensating the drop at the low frequencies, and there are no reflecting surfaces located close to the external ear of the user. The low frequencies drop may be compensated by passive or blind diaphragms, or the diaphragm of the electroacoustic transducer may be coupled to an air mass. A headset, including two headphones, may be designed for quadraphonic reproduction.

REFERENCES:
patent: 4071717 (1978-01-01), Fidi et al.

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