Earphone

Details Earphone Earphone

1994-05-26

1995-03-07

Kuntz, Curtis

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

381183, H04R 2500

Patent

active

053965639

ABSTRACT:
An earphone includes an earplug of sound insulating material which is insertable in the external auditory meatus of an ear, and an elastic vibration generator responsive to an electric signal supplied thereto for generating and applying an elastic wave corresponding to the supplied electric signal to an outer end of the earplug inserted in the external auditory meatus. The elastic vibration generator may be held in or out of contact with the earplug, so that the elastic wave generated by the elastic vibration generator can be applied directly or indirectly to the earplug. The earphone may be combined with a helmet or a headband. The earplug is effective to prevent external noise from being transmitted to the ear drum of the ear, and also allows desired sound to be transmitted in the form of an elastic wave reliably and clearly to the ear drum.

REFERENCES:
patent: 2148477 (1939-02-01), Koch
patent: 4025734 (1977-05-01), Aloupis
patent: 4652702 (1987-03-01), Yoshii
patent: 4756312 (1988-07-01), Epley
patent: 4975967 (1990-12-01), Rasmussen
patent: 5073947 (1991-12-01), Reddemann
patent: 5125032 (1992-06-01), Meister et al.
European Search Report.
Annex to the European Search Report on European Patent Application No. EP 92305077.7.

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