Loudspeaker having improved directional characteristics

Details Loudspeaker having improved directional characteristics Loudspeaker having improved directional characteristics

1981-12-28

1984-04-24

Pellinen, A. D.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Hearing aid

181155, 181DIG1, 381 90, H04R 134, H04R 502

Patent

active

044452276

ABSTRACT:
A loudspeaker system (10) having improved directional and frequency response characteristics for use in connection with a sound system having at least two speakers such as a stereo system which is provided. The loudspeaker system includes a driver (14) for low frequencies and/or a full range of frequencies. This driver includes an electroacoustic transducer unit and a sound radiating face having a dustcap (16) and a diaphragm (36). A dispersion control member (34) is positioned at a preselected location such that it overlays a preselected portion of the sound radiating face of the speaker to enhance its directional characteristics. In this connection, the dispersion control member (34) comprises a layer of acoustical, semi-transparent foam having a preselected cross-sectional outline which preferably terminates in one substantially straight edge (38). This member (34) is positioned such that its edge (38) is substantially aligned with the imaginary vertical center line of the sound radiating face thereby expanding the area of stereo imagery such that a listener can be positioned at various locations within the area in front of the speakers and still enjoy the full stereo effect.

REFERENCES:
patent: 3735336 (1973-05-01), Long
patent: 3834486 (1974-09-01), Tsuge et al.
patent: 3862366 (1975-01-01), Huszty et al.
patent: 4122302 (1978-10-01), Bobb
patent: 4224469 (1980-09-01), Karson
patent: 4387787 (1983-06-01), King

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