Headset case arrangement for wind control

• US 20060034476A1
• Filed: 08/12/2004
• Published: 02/16/2006
• Est. Priority Date: 08/12/2004
• Status: Abandoned Application

• Current Assignee: Cardo Corporation
• Original Assignee: Cardo Corporation
• Inventors: Glezerman, Abraham
• Application Number:
  US10/917,258
• Publication Number:
  US 20060034476A1
• Time in Patent Office: Days
• US Class Current: 381/375
• CPC Class Codes: H04R 1/1016 Earpieces of the intra-aural type
• CPC Class Codes: H04R 1/1075 Mountings of transducers in earphones or headphones
• CPC Class Codes: H04R 2201/107 Monophonic and stereophonic headphones with microphone for two-way hands free communication
• CPC Class Codes: H04R 2410/07 Mechanical or electrical reduction of wind noise generated by wind passing a microphone
• CPC Class Codes: H04R 2420/07 Applications of wireless loudspeakers or wireless microphones

Abstract

A wireless communication headset for reducing wind-induced noise and providing improved microphone performance under a variety of different ambient noise conditions includes a housing defining a cavity and first and second apertures in communication with the cavity. A microphone disposed within the cavity has a transducer oriented along an axis, whereby the first and second apertures are located on opposite sides of the axis. A baffle surrounds the transducer and is oriented along the axial direction. Optionally, a shroud at a forward end of the baffle defines an air space ahead of the transducer. Further still, a liner such as a foam layer or swatch of fabric is disposed within the cavity, providing a diffuse acoustic path between the first and second apertures and the transducer so as to prevent wind flow from directly impinging upon the microphone.

Claims

1. A wireless communication headset comprising:

a housing defining a cavity and first and second apertures in communication with the cavity;

a microphone disposed within the cavity, the microphone having a transducer oriented along an axis, the first and second apertures being on opposite sides of the axis;

a baffle surrounding the transducer and oriented along the axial direction;

a liner disposed within the cavity so as to prevent wind flow from directly impinging upon the transducer of the microphone.

2. The headset of claim 1, wherein the housing is free of any aperture which is oriented along the axial direction and in communication with the cavity.

3. The headset of claim 1, wherein the apertures have an elongated length, and wherein the baffle is axially shorter than the elongated length.

4. The headset of claim 1, wherein the liner overlies the first and second apertures to provide the diffuse acoustic path for substantially all air paths within the cavity.

5. The headset of claim 1, wherein air paths between the first and second apertures flow in a direction that is perpendicular to the transducer.

6. The headset of claim 1, further comprising a communication circuit, the communication circuit being configured to process acoustic signals coupled by the transducer.

7. The headset of claim 1, wherein the liner comprises a swatch of fabric.

8. The headset of claim 7, wherein the swatch of fabric is made of a GORTEX material.

9. A wireless communication headset comprising:

a housing defining a cavity and first and second apertures in communication with the cavity;

a microphone disposed within the cavity, the microphone having a transducer oriented along an axis, the first and second apertures being on opposite sides of the axis;

a baffle having a shroud surrounding the transducer and oriented along the axial direction to define an air space ahead of the transducer;

a foam layer disposed within the cavity and surrounding the shroud, the foam layer providing a diffuse acoustic path between the first and second apertures and the shroud so as to prevent wind flow from directly impinging upon the microphone.

10. The headset of claim 9, wherein the housing is free of any aperture which is oriented along the axial direction and in communication with the cavity.

11. The headset of claim 9, wherein the apertures have an elongated length, and wherein the baffle is axially shorter than the elongated length.

12. The headset of claim 9, wherein the foam layer extends substantially between the first and second apertures to provide the diffuse acoustic path for substantially all air paths therebetween.

13. The headset of claim 9, wherein the foam layer has an acoustic resistivity of at least 1 acoustic Ω

/cm².

14. The headset of claim 9, wherein the foam layer has an acoustic resistivity of at least 2 acoustic Ω

/cm².

15. The headset of claim 9, wherein air paths between the first and second apertures flow in a direction that is perpendicular to the transducer.

16. The headset of claim 9, further comprising a communication circuit, the communication circuit being configured to process acoustic signals coupled by the transducer.