Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Reexamination Certificate
2006-09-19
2006-09-19
Le, Huyen (Department: 2615)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Plural or compound reproducers
C381S371000, C381S382000
Reexamination Certificate
active
07110563
ABSTRACT:
Headphones or earphones are commonly known as electro-acoustic transducers used by a single listener. The invention relates to combing insert and non-insert electro-acoustic transducers in a headphone element. In this way a combination of a wide-low frequency reproduction (insert type) and a wide-high frequency reproduction (non-insert type) are obtained.
REFERENCES:
patent: 4239945 (1980-12-01), Atoji et al.
patent: 6259796 (2001-07-01), Lin
patent: 2006/0067555 (2006-03-01), Tsai
Koninklijke Philips Electronics , N.V.
Le Huyen
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