Device with acoustic guard

• US 7,986,800 B2
• Filed: 02/20/2007
• Issued: 07/26/2011
• Est. Priority Date: 02/20/2007
• Status: Active Grant

• Current Assignee: Fortemedia, Inc.
• Original Assignee: Fortemedia, Inc.
• Inventors: Xu, Kai, Zhang, Ming
• Primary Examiner(s): Ni; Suhan
• Application Number:
  US11/676,677
• Publication Number:
  US 20080199034A1
• Time in Patent Office: 1,617 Days
• Field of Search: 381355-358, 381/365, 381/189, 381337-339
• US Class Current: 381/189
• CPC Class Codes: G01S 19/14 specially adapted for specific applications
• CPC Class Codes: H04R 1/086 Protective screens, e.g. all weather or wind screens
• CPC Class Codes: H04R 2499/13 Acoustic transducers and sound field adaptation in vehicles

Abstract

A device includes a main body, a microphone module, and an acoustic guard. The microphone module is connected to the main body and comprises a first acoustic opening and a second acoustic opening, wherein the microphone module receives sound waves via both the first and second acoustic openings. The acoustic guard covers the second acoustic opening and comprises a first sound inlet via which the sound waves enter the acoustic guard and reach the second acoustic opening.

Claims

1. A device, comprising:

a main body;

a microphone module connected to the main body, comprising a first acoustic opening and a second acoustic opening, wherein the microphone module receives sound waves via both the first and second acoustic openings; and

an acoustic guard covering the second acoustic opening and comprising a first sound inlet via which the sound waves enter the acoustic guard and reach the second acoustic opening;

wherein the microphone module further comprises a unidirectional microphone receiving the sound waves via the first and second acoustic openings, a third acoustic opening, and an omnidirectional microphone receiving the sound waves via the third acoustic opening.

2. The device as claimed in claim 1, wherein the acoustic guard is oriented lengthwise.

3. The device as claimed in claim 2, wherein the first sound inlet is provided at an end of the acoustic guard.

4. The device as claimed in claim 3, wherein the acoustic guard further comprises a second sound inlet provided at another end thereof.

5. The device as claimed in claim 1, wherein the unidirectional microphone comprises a front surface receiving the sound waves via the first acoustic opening, and a rear surface receiving the sound waves via the second acoustic opening.

6. The device as claimed in claim 1, wherein the unidirectional microphone and the omnidirectional microphone are disposed in different chambers and acoustically isolated from each other.

7. The device as claimed in claim 1, wherein the main body comprises a top, with the acoustic guard attached thereto.

8. The device as claimed in claim 1, wherein the main body comprises a bottom, with the acoustic guard attached thereto.

9. A device, comprising:

a main body;

a microphone module connected to the main body, comprising a first acoustic opening and a second acoustic opening, wherein the microphone module receives sound waves via both the first and second acoustic openings; and

an acoustic guard covering the second acoustic opening, being oriented lengthwise, and opening at an end thereof;

wherein the microphone module further comprises a unidirectional microphone receiving the sound waves via the first and second acoustic openings, a third acoustic opening, and an omnidirectional microphone receiving the sound waves via the third acoustic opening.

10. The device as claimed in claim 9, wherein the acoustic guard extends in a first direction, and opens towards the first direction.

11. The device as claimed in claim 9, wherein the acoustic guard extends in a first direction, and opens towards a second direction perpendicular to the first direction.

12. The device as claimed in claim 9, wherein the acoustic guard is closed at another end.

13. The device as claimed in claim 9, wherein the acoustic guard opens at both ends.

14. The device as claimed in claim 9, wherein the unidirectional microphone comprises a front surface receiving the sound waves via the first acoustic opening, and a rear surface receiving the sound waves via the second acoustic opening.

15. The device as claimed in claim 9, wherein the unidirectional microphone and the omnidirectional microphone are disposed in different chambers and acoustically isolated from each other.

16. The device as claimed in claim 9, wherein the main body comprises a top, with the acoustic guard attached thereto.

17. The device as claimed in claim 9, wherein the main body comprises a bottom, with the acoustic guard attached thereto.

18. A device, comprising:

a main body;

a microphone module connected to the main body, comprising a first acoustic opening and a second acoustic opening, wherein the microphone module receives sound waves via both the first and second acoustic openings; and

a tube comprising a first sound inlet via which the sound waves enter the tube and reach the second acoustic opening;

wherein the microphone module further comprises a unidirectional microphone receiving the sound waves via the first and second acoustic openings, a third acoustic opening, and an omnidirectional microphone receiving the sound waves via the third acoustic opening.

19. The device as claimed in claim 18, wherein the tube further comprises a second sound inlet connected to the second acoustic opening of the microphone module.

20. The device as claimed in claim 18, wherein the tube is built in the main body.