Earphone

Details Earphone Earphone

1985-10-30

1987-03-03

Fuller, Benjamin R.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181149, 387158, 387187, H04R 2500

Patent

active

046468722

ABSTRACT:
An earphone having a housing, a speaker unit accommodated in the housing and a duct formed in the housing to pass sound emanated from the rear surface of the speaker unit and in which a mesh subjected to water repellent treatment is provided within the duct.

REFERENCES:
patent: 3586794 (1971-06-01), Michaelis
patent: 4005278 (1977-01-01), Gorke
patent: 4441576 (1984-04-01), Allen

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