Stereo sound system

• US 4,509,184 A
• Filed: 03/25/1983
• Issued: 04/02/1985
• Est. Priority Date: 03/18/1982
• Status: Expired due to Fees

• Current Assignee: Pioneer Electronic Corporation (Pioneer Corporation)
• Original Assignee: Pioneer Electronic Corporation (Pioneer Corporation)
• Inventors: Yanagawa, Hirofumi
• Primary Examiner(s): Rubinson, Gene Z.
• Assistant Examiner(s): Brady, W. J.
• Application Number:
  US06/478,943
• Time in Patent Office: 739 Days
• Field of Search: 181/144, 181/145, 181/148, 181/147, 181/152, 181/199, 181/146, 381/24, 381/27, 381/86, 381/88, 381/89, 381/90, 381/25
• US Class Current: 381/308
• CPC Class Codes: H04R 5/02 Spatial or constructional arrangements of loudspeakers

Abstract

A stereo sound system for reproducing signals from two independent channels through right and left speakers. The two speakers are centrally located and propagate a lesser part of their acoustic output directly into free space. Two acoustic tunnels separately couple the major part of the outputs of the respective speakers and have their issuing ends far removed on either side of the speakers. The tunnels provide advantageous delay.

Claims

1. A stereo sound system for reproducing signals from two indlependent channels, comprising:

right and left speakers;

center means for summing in phase and attenuating the acoustic outputs of said right and left speaker and radiating said summed attenuated signals; and

right and left acoustic tunnels having input ends facing at least a portion of said right and left speakers respectively and sound issuing ends located on the right and left sides respectively of said center means, said tunnels delaying signals propagating from said input ends to said sound issuing ends.

2. A sound system as claimed in claim 1, wherein said mixer means comprises means for establishing a relatively small spacing between said sound issuing ends of said right and left speakers.

3. A sound system as claimed in claim 1, wherein said attenuator means comprises means for establishing a proper cross-sectional area ratio between, respectively, said sound issuing ends of said right and left speakers and said right and left acoustic tunnels.

4. A stereo sound system for reproducing signals from two independent channels, comprising:

a right speaker;

p1 a left speaker closely adjacent said right speaker;

a right acoustic tunnel with a sound issuing end situated substantially to the right of said right speaker;

right acoustic dividing means for dividing the acoustic output of said right speaker between said right tunnel and that radiated directly from said right-speaker;

a left acoustic tunnel with a sound issuing end situated substantially to the left of said left speaker; and

left acoustic dividing means for dividing the acoustic output of said left speaker between said left tunnel and radiated directly from said left speaker.

5. A stereo sound system as recited in claim 4, wherein said left and right acoustic dividing means cause a lesser portion of the acoustic output of said speakers to radiate directly from said speakers.

6. A stereo system as recited in claim 4, wherein said left and right speakers are horizontally arranged with respect to each other.

7. A stereo system as recited in claim 4, wherein said left and right speakers are substantially vertically arranged with respect to each other.