Sound reproduction device

• US 8,861,774 B2
• Filed: 08/23/2011
• Issued: 10/14/2014
• Est. Priority Date: 09/27/2010
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Patent Center (Panasonic Holdings Corporation)
• Inventors: Takeda, Katsu, Konno, Fumiyasu, Shoji, Rihito, Fukushima, Susumu
• Primary Examiner(s): Goins, Davetta W
• Assistant Examiner(s): DABNEY, PHYLESHA LARVINIA
• Application Number:
  US13/825,246
• Publication Number:
  US 20130182883A1
• Time in Patent Office: 1,148 Days
• Field of Search: 381/71.7, 381/107, 381386-390, 381 86- 87, 381303-306, 181/199
• US Class Current: 381/387
• CPC Class Codes: H04R 1/026 Supports for loudspeaker casings
• CPC Class Codes: H04R 1/06 Arranging circuit leads; Relieving strain on circuit leads
• CPC Class Codes: H04R 1/323 for loudspeakers H04R1/34 and H04R1/40 take precedence
• CPC Class Codes: H04R 1/345 for loudspeakers
• CPC Class Codes: H04R 2201/025 Transducer mountings or cabinet supports enabling variable orientation of transducer of cabinet
• CPC Class Codes: H04R 2217/03 Parametric transducers where sound is generated or captured by the acoustic demodulation of amplitude modulated ultrasonic waves
• CPC Class Codes: H04R 2499/13 Acoustic transducers and sound field adaptation in vehicles
• CPC Class Codes: H04R 5/02 Spatial or constructional arrangements of loudspeakers

Abstract

A sound reproduction device includes a superdirective speaker having a first surface, and an attachment part having a second surface opposed to the first surface. The first surface has a convex face, and the second surface has a concave face which can come into contact with the convex face. A curvature of the convex face is set larger than that of the concave face. A direction of emitting a sound wave of the superdirective speaker can be adjusted by making the convex face move along the concave face.

Claims

1. A sound reproduction device comprising:

a superdirective speaker having a sound wave emitting face for emitting an ultrasonic wave and a first surface; and

an attachment part having a second surface opposed to the first surface, wherein;

at least a part of the sound wave emitting face of the superdirective speaker is a mirror face,

the first surface has a convex face,

the second surface has a concave face which can come into contact with the convex face,

a curvature of the convex face is set larger than that of the concave face, and

a direction of emitting a sound wave of the superdirective speaker is adjusted by changing tilt of the sound wave emitting face by moving the convex face along the concave face.

2. The sound reproduction device according to claim 1, wherein

a first electrode is provided on an entire or a part of the convex face, a second electrode is provided on an entire or a part of the concave face, and

an electric signal is supplied from the attachment part to the superdirective speaker by a pair of the first and second electrodes.

3. The sound reproduction device according to claim 1, wherein

the superdirective speaker has substantially a circular columnar shape having a top surface, an under surface, and a side surface connected to the top surface and the under surface,

the first surface is the side surface of the circular columnar shape,

the top surface is the sound wave emitting face, and

each of the curvature of the convex face and the curvature of the concave face is a curvature in a section including a center axis of the circular columnar shape.

4. The sound reproduction device according to claim 3, wherein

a first electrode is provided on an entire or a part of the convex face, a second electrode is provided on an entire or a part of the concave face, and

an electric signal is supplied from the attachment part to the superdirective speaker by a pair of the first and second electrodes.

5. The sound reproduction device according to claim 4, wherein the convex face and the concave face are constructed so that the superdirective speaker is not turned by 180 degrees or more in a circumferential direction of the sound wave emitting face.

6. A sound reproduction device comprising:

a superdirective speaker having a sound wave emitting face for emitting an ultrasonic wave and a first surface; and

an attachment part having a second surface opposed to the first surface, wherein;

at least a part of the sound wave emitting face of the superdirective speaker is a mirror face,

the second surface has a convex face,

the first surface has a concave face which can come into contact with the convex face,

a curvature of the convex face is set larger than that of the concave face, and

a direction of emitting a sound wave of the superdirective speaker is adjusted by changing tilt of the sound wave emitting face by moving the convex face move along the concave face.

7. The sound reproduction device according to claim 6, wherein

a first electrode is provided on an entire or a part of the convex face, a second electrode is provided on an entire or a part of the concave face, and

an electric signal is supplied from the attachment part to the superdirective speaker by a pair of the first and second electrodes.

8. The sound reproduction device according to claim 6, wherein

the superdirective speaker has substantially a circular columnar shape having a top surface, an under surface, and a side surface connected to the top surface and the under surface,

the first surface is the side surface of the circular columnar shape,

the top surface is the sound wave emitting face, and

each of the curvature of the convex face and the curvature of the concave face is a curvature in a section including a center axis of the circular columnar shape.

9. The sound reproduction device according to claim 8, wherein

a first electrode is provided on an entire or a part of the convex face, a second electrode is provided on an entire or a part of the concave face, and

an electric signal is supplied from the attachment part to the superdirective speaker by a pair of the first and second electrodes.

10. The sound reproduction device according to claim 9, wherein the convex face and the concave face are constructed so that the superdirective speaker is not turned by 180 degrees or more in a circumferential direction of the sound wave emitting face.