Electroacoustic transducer having a partition wall and a mask wa

Details Electroacoustic transducer having a partition wall and a mask wa Electroacoustic transducer having a partition wall and a mask wa

1993-06-16

1994-04-12

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

181160, 381 90, 381159, 381192, H04R 2100

Patent

active

053032098

ABSTRACT:
In an electroacoustic transducer (1) having a diaphragm (5), behind which a partition wall (24) is situated, which partition wall extends transversely of the transducer axis (9) and is traversed by partition openings (29, 30, 31, 32) having a small cross-sectional area of at the most 0.2 mm.sup.2, and having a mask wall (38) arranged adjacent the partition wall and provided with mask-wall openings (39, 40, 41, 42) of large cross-sectional area, in the other wall (38) being coincident with at least one opening (29, 30, 31, 32) of small cross-sectional area, each opening (29, 30, 31, 32) of small cross-sectional area is situated between two spacer elements (49, 50, 51, 52, 53, 54, 55, 56) arranged between the two walls (24, 38), and each time two spacer elements (49, 50, 51, 52, 53, 54, 55, 56) together with the two walls (34, 38) bound a duct-like gap (57, 58, 59, 60) between the two walls (24, 38) in order to form an acoustic resistance.

REFERENCES:
patent: 4027116 (1977-05-01), Nakamura
patent: 4054748 (1977-10-01), Balogh
patent: 4860368 (1989-08-01), Payer et al.
patent: 4918738 (1990-04-01), Bader
patent: 4949387 (1990-08-01), Andert et al.
patent: 5166984 (1992-11-01), Hsiao

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