Electroacoustic transducer being acoustical tight in the...

Details Electroacoustic transducer being acoustical tight in the... Electroacoustic transducer being acoustical tight in the...

2005-12-13

2005-12-13

Ni, Suhan (Department: 2643)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S407000, C381S412000

Reexamination Certificate

active

06975741

ABSTRACT:
A transducer (1) includes a transducer axis (2), a membrane (3), a magnet system (6) having an outer magnet system part (7) and an inner magnet system part (8), a moving coil configuration (27) connected to the membrane (3) and having a coil carrier (28) and a moving coil (29) held by the coil carrier (28) in an air gap (14) between the two magnet system parts (7, 8), and guides (36) for rectilinearly guiding the moving coil configuration (27) parallel to the transducer axis (2). The moving coil configuration (27) has a cylindrical boundary surface (42) which, together with a cylindrical boundary surface (15) of the outer magnet system part (7), delimits a cylindrical gap (43) which is acoustically impermeable above a lower limit frequency of at most 100 Hz.

REFERENCES:
patent: 5408533 (1995-04-01), Reiffin
patent: 5590211 (1996-12-01), Chang
patent: 6088466 (2000-07-01), Proni
patent: 6359996 (2002-03-01), Ohashi
patent: 383376 (1932-11-01), None

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