Loudspeaker apparatus and speaker system

• US 8,411,883 B2
• Filed: 06/19/2009
• Issued: 04/02/2013
• Est. Priority Date: 06/19/2008
• Status: Active Grant

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: Matsumoto, Keishi
• Primary Examiner(s): Pan, Yuwen
• Assistant Examiner(s): MONIKANG, GEORGE C
• Application Number:
  US12/488,204
• Publication Number:
  US 20090316938A1
• Time in Patent Office: 1,383 Days
• Field of Search: 381/300, 381/303, 381/304, 381/59, 381/335, 381/336
• US Class Current: 381/303
• CPC Class Codes: H04R 2201/403 Linear arrays of transducers
• CPC Class Codes: H04R 2499/15 Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
• CPC Class Codes: H04R 3/12 for distributing signals to two or more loudspeakers specially adapted for hearing aids H04R25/407
• CPC Class Codes: H04S 7/301 Automatic calibration of stereophonic sound system, e.g. with test microphone
• CPC Class Codes: H04S 7/302 Electronic adaptation of stereophonic sound system to listener position or orientation H04S7/301 takes precedence
• CPC Class Codes: H04S 7/303 Tracking of listener position or orientation

Abstract

A loudspeaker apparatus includes a speaker array that has a plurality of speaker units which are arranged on a sound emitting surface of the speaker array, and emits sound beams on a plurality of channels, an angle sensing section that senses an angle change displaced from a previously set reference angle of the sound emitting surface, and an adjusting section that adjusts output angles of the sound beams in response to the angle change.

Claims

1. A loudspeaker apparatus comprising:

a speaker array that has a sound emitting surface and a plurality of speaker units arranged relative to the sound emitting surface that emits sound beams for a plurality of channels;

an angle sensing section that senses an angle change in the sound emitting surface relative to a set reference angle position of the sound emitting surface; and

an adjusting section that adjusts output angles of the sound beams in response to the angle change sensed by the angle sensing section, and

wherein the adjusting section adjusts the output angles of the sound beams except a sound beam for a center channel among the sound beams for the plurality of channels.

2. The loudspeaker apparatus according to claim 1, wherein the adjusting section adjusts the output angles of the sound beams in at least one of a horizontal direction or a vertical direction.

3. The loudspeaker apparatus according to claim 1, further comprising:

a storage section that stores information regarding delay amounts of sound signals with respect to angle changes the set reference position of the sound emitting surface,

wherein the delay amount corresponding to the angle change sensed by the angle sensing section is read from the storage section, and

wherein the adjusting section sets the delay amount read from the storage section to the speaker units to adjust the output angles of the sound beams.

4. The loudspeaker apparatus according to claim 1, wherein an angle of the sound emitting surface at a time of receiving information regarding an interior shape of a room and a set-up position of the loudspeaker apparatus in the room is set as the reference angle position.

5. The loudspeaker apparatus according to claim 1, wherein an angle of the sound emitting surface at a time of measuring a shape of an interior of a room and a relationship between a listening position and the loudspeaker apparatus by sweeping a test sound beam is set as the reference angle position.

6. A loudspeaker apparatus comprising:

a speaker array that has a sound emitting surface and a plurality of speaker units arranged relative to the sound emitting surface that emits sound beams for a plurality of channels;

an angle sensing section that senses an angle change in the sound emitting surface relative to a set reference angle position of the sound emitting surface; and

an adjusting section that adjusts output angles of the sound beams in response to the angle change sensed by the angle sensing section,

wherein the adjusting section adjusts the output angles of the sound beams for all of the plurality of channels, including the center channel, when the angle change is smaller than a predetermined degree, and

wherein the adjusting section adjusts the output angles of the sound beams except the sound beam for the center channel when the angle change exceeds the predetermined degree.

7. A speaker system comprising:

a loudspeaker apparatus; and

a display apparatus integrally constructed with the loudspeaker apparatus,

wherein the loudspeaker apparatus includes;

a speaker array that has a sound emitting surface and a plurality of speaker units arranged relative to the sound emitting surface that emits sound beams for a plurality of channels;

an angle sensing section that senses an angle change in the sound emitting surface relative to a set reference angle position of the sound emitting surface, provided in at least one of the loudspeaker apparatus or the display apparatus; and

an adjusting section that adjusts output angles of the sound beams in response to the angle change sensed by the angle sensing section,

wherein the adjusting section adjusts the output angles of the sound beams except a sound beam for a center channel among the sound beams for the plurality of channels.

8. A speaker system comprising:

a loudspeaker apparatus; and

a display apparatus integrally constructed with the loudspeaker apparatus,

wherein the loudspeaker apparatus includes;

a speaker array that has a sound emitting surface and a plurality of speaker units arranged relative to the sound emitting surface that emits sound beams for a plurality of channels;

an angle sensing section that senses an angle change in the sound emitting surface relative to a set reference angle position of the sound emitting surface, provided in at least one of the loudspeaker apparatus or the display apparatus; and

an adjusting section that adjusts output angles of the sound beams in response to the angle change sensed by the angle sensing section,

wherein the adjusting section adjusts the output angles of the sound beams for all of the plurality of channels, including the center channel, when the angle change is smaller than a predetermined degree, and

wherein the adjusting section adjusts the output angles of the sound beams except the sound beam for the center channel when the angle change exceeds the predetermined degree.