Electroacoustical transducing

• US 20080031472A1
• Filed: 08/04/2006
• Published: 02/07/2008
• Est. Priority Date: 08/04/2006
• Status: Abandoned Application

• Current Assignee: Bose Corporation
• Original Assignee: Bose Corporation
• Inventors: Freeman, Eric J., Stark, Michael W., Berardi, William, Hartung, Klaus
• Application Number:
  US11/499,014
• Publication Number:
  US 20080031472A1
• Time in Patent Office: Days
• US Class Current: 381/89
• CPC Class Codes: H04R 1/02 Casings; Cabinets ; Supports therefor; Mountings therein H04R1/28 takes precedence ; attachments for microphones H04R1/08; mounting of transducers in earpieces H04R1/1075
• CPC Class Codes: H04R 1/227 using transducers reproducing the same frequency band
• CPC Class Codes: H04R 1/2873 for loudspeaker transducers
• CPC Class Codes: H04R 3/12 for distributing signals to two or more loudspeakers specially adapted for hearing aids H04R25/407

Abstract

Electroacoustical apparatus includes at least first and second acoustically coupled electroacoustical drivers. An electrical network couples their inputs so that an electrical drive signal applied to one reduces the effect of acoustic coupling from that one to the other.

Claims

1. Electroacoustical apparatus comprising,

a cabinet enclosure,

at least first and second electroacoustical drivers acoustically coupled in said cabinet enclosure each having first and second inputs respectively for receiving first and second electrical drive signals respectively,

and an electrical network intercoupling said first and second inputs constructed and arranged to provide a first opposition signal on said second input in phase opposition to a first electrical drive signal on said first input to reduce the effect of acoustic coupling from said first electroacoustical driver to said second electroacoustical driver when said first electrical drive signal is applied to said first input.

2. Electroacoustical apparatus in accordance with claim 1 wherein said first and second electroacoustical drivers are of the same design.

3. Electroacoustical apparatus in accordance with claim 1 wherein said first and second electroacoustical drivers are of differing design

4. Electroacoustical apparatus in accordance with claim 1 wherein said electrical network is constructed and arranged to provide a second opposition signal on said first input in phase opposition to a second electrical drive signal on said second input to reduce the effect of acoustic coupling from said second electroacoustical driver to said first electroacoustical driver when said second electrical driver signal is applied to said second input.

5. Electroacoustical apparatus in accordance with claim 4 wherein said first and second electroacoustical drivers are of the same design

6. Electroacoustical apparatus in accordance with claim 4 wherein said first and second electroacoustical drivers are of differing design.

7. Electroacoustical apparatus in accordance with claim 1 wherein said enclosure is sealed.