Interference-free transmitting receiving earset

Details Interference-free transmitting receiving earset Interference-free transmitting receiving earset

2008-04-22

2008-04-22

Ni, Suhan (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

C381S370000, C381S384000

Reexamination Certificate

active

10949308

ABSTRACT:
A interference-free transmitting receiving earset includes a housing houses a speaker, a grille covering the speaker and having a front center tube, and two microphones mounted in the center tube of the grille in reversed directions to pick up sound waves from the user's external auditory canal and wound waves from the speaker respectively and to eliminate interference of sound waves from the speaker with sound waves produced by the user in the external auditory canal.

REFERENCES:
patent: 6181801 (2001-01-01), Puthuff et al.
patent: 6411722 (2002-06-01), Wolf
patent: 6683965 (2004-01-01), Sapiejewski

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