Headset ear seal

• US 5,138,722 A
• Filed: 07/02/1991
• Issued: 08/18/1992
• Est. Priority Date: 07/02/1991
• Status: Expired due to Fees

• Current Assignee: David Clark Company Incorporated
• Original Assignee: David Clark Company Incorporated
• Inventors: Van Lennep, William B., Urella, Richard M.
• Primary Examiner(s): Schroeder, Werner H.
• Assistant Examiner(s): OLEKSA, DIANA LYNN
• Application Number:
  US07/724,674
• Time in Patent Office: 413 Days
• Field of Search: 2/2, 2/171, 2/208, 2/209, 2/410, 2/411, 2/412, 2/413, 2/414, 2/416, 2/423
• US Class Current: 2/209
• CPC Class Codes: A61F 11/14 external, e.g. earcaps or earmuffs
• CPC Class Codes: H04R 1/1008 Earpieces of the supra-aural or circum-aural type
• CPC Class Codes: H04R 1/1083 Reduction of ambient noise active noise reduction per se G10K11/175; protective devices for the ear, e.g. providing acoustic protection A61F11/06

Abstract

An ear seal for use with an earcup of a headset. The ear seal includes at least one ring of noise attenuating material, the material being a mixture of a dilatant silicone compound and a silicone fluid. A sheath is provided to enclose the ring of noise attenuating material. A ring of soft compliant material may also be used adjacent the ring of noise attenuating material for added comfort to the user. A sheath may be provided to enclose both the ring of soft compliant material and the ring of noise attenuating material.

Claims

1. An ear seal for use in an earcup of a headset, comprising:

at least one ring of a noise attenuating material, said material comprising a mixture of a dilatant silicone compound and a silicone fluid; and

a first sheath enclosing said at least one ring of noise attenuating material.

2. The ear seal as claimed in claim 1, wherein said noise attenuating material is a soft compliant material, thus providing an improved acoustic seal and a comfortable fit to a user of said headset.

3. The ear seal is claimed in claim 2, wherein said sheath comprises a thin resilient skin.

4. The ear seal as claimed in claim 3, wherein said skin is polyurethane.

5. The ear seal as claimed in claim 1, further comprising:

at least one ring of a soft compliant material disposed adjacent to said first sheath which encloses said at least one ring of noise attenuating material; and

a second sheath enclosing both said first sheath which encloses said at least one ring of noise attenuating material and said at least one ring of soft compliant material.

6. The ear seal as claimed in claim 5, wherein said soft compliant material is a silicone gel.

7. The ear seal as claimed in claim 5, wherein said second sheath comprises a thin resilient skin.

8. The ear seal as claimed in claim 7, wherein said skin is polyurethane.

9. The ear seal as claimed in claim 5, wherein said at least one ring of soft compliant material is disposed atop said first sheath within said second sheath so as to be proximate to the head of a user of said ear seal.

10. An ear seal for use in a earcup of a headset, comprising:

at least one ring of a noise attenuating material, said material comprising a mixture of a dilatant silicone compound and a silicone fluid;

at least one ring of a soft compliant material disposed adjacent to said at least one ring of noise attenuating material; and

a first sheath enclosing said at least one ring of noise attenuating material and said at least one ring of soft compliant material.

11. The ear seal as claimed in claim 10, further comprising a second sheath enclosing said at least one ring of noise attenuating material so as to separate same from said at least one ring of soft compliant material within said first sheath.

12. The ear seal as claimed in claim 11, wherein said second sheath comprises a thin resilient skin.

13. The ear seal as claimed in claim 12, wherein said skin is polyurethane.

14. The ear seal as claimed in claim 10, wherein said soft compliant material is a silicone gel.

15. The ear seal as claimed in claim 10, wherein said at least one ring of soft compliant material is disposed atop said at least one ring of noise attenuating material so as to be proximate to the head of a user of said ear seal.

16. The ear seal as claimed in claim 10, wherein said first sheath comprises a thin resilient skin.

17. The ear seal as claimed in claim 16, wherein said skin is polyurethane.

18. A noise attenuating material for use in an ear seal of a headset, said material comprising a mixture of a dilatant silicone compound and a silicone fluid.