Earphone structure with a composite sound field

Details Earphone structure with a composite sound field Earphone structure with a composite sound field

2008-10-30

2011-10-18

Le, Huyen D. (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

C381S309000, C381S370000

Reexamination Certificate

active

08041067

ABSTRACT:
An earphone structure including one or more composite chambers is described. Each of the composite chambers includes sub-speakers. The sounds generated by these sub-speakers are uniformly distributed in the composite chamber and a composite sound field is generated by these sub-speakers. The sound field generated by each of these sub-speakers can be adjusted by re-locating the position of the sub-speaker, for example, by re-locating the sub-speaker, or by re-locating the sub-speaker in different angles, to generate the composite sound field. The sound field generated by the main speaker and the composite sound field generated by these sub-speakers can form a spatial sound with very good quality. By using of its physical characteristics of locations of these sub-speakers, the sound generated by the earphone has an uniformly diffusion sound pressure and a surround effect, which allows a user of the earphone to enjoy a sound field similar to that in a theater.

REFERENCES:
patent: 7155025 (2006-12-01), Weffer
patent: 7289641 (2007-10-01), Yang
patent: 7817814 (2010-10-01), Yang
patent: 2004/0218775 (2004-11-01), Huang
patent: 2126677 (1972-08-01), None
patent: 62080492 (1987-04-01), None
patent: 01-314098 (1989-12-01), None
“Office Action of German counterpart application”, issued on Jul. 15, 2009, p. 1-p. 17.

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