IP Library › Granted Patent US 6,978,033
Granted Patent B2
US 6,978,033 · App. 10/078,625 · Granted Dec 20, 2005

Microphone gasket with integrated acoustic resistance

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Quick Facts
Patent No.
US 6,978,033
App. No.
10/078,625
Granted
Dec 20, 2005
Kind
B2
Abstract

An acoustically resistive membrane is incorporated into a gasket construction for use with a microphone. Preferably, a molded thermoplastic gasket is provided with an integrated acoustically resistive element in the form of a thin perforated membrane that is molded into the gasket at an appropriate location for optimum acoustic performance.

Claims (7)

1. A gasket for use with a microphone, comprising:

at least one tube, wherein said tube is approximately 15 mm in length to provide a 4000 Hz cut-off frequency and to provide significant electrostatic discharge protection, for receiving said microphone and for directing sound thereto, said tube giving rise to a characteristic acoustical response for said microphone; and

a perforated membrane within said tube and integrally moulded therewith for modifying the acoustical response of said microphone.

2. A gasket for use with a microphone, comprising:

at least one tube for receiving said microphone and for directing sound thereto, said tube giving rise to a characteristic acoustical response for said microphone; and

a membrane within said tube and integrally moulded therewith for modifying the acoustical response of said microphone, wherein said membrane is approximately 2.5 mm in diameter and 0.5 mm thick, and is perforated with nine square holes of 0.25 mm which are evenly distributed across said membrane.

3. The gasket of claim 1 , wherein the perforated membrane has an acoustical resistance and the perforated membrane is configured wherein the modification of the acoustical response is configured to damp the resonance inherent in the tube construction.

Assignments (24)
RELEASE OF SECURITY INTEREST Recorded Jun 24, 2025
From: ANKURA TRUST COMPANY, LLC
To: MITEL (DELAWARE), INC.; MITEL COMMUNICATIONS, INC.; MITEL CLOUD SERVICES, INC.; MITEL NETWORKS, INC.; MITEL NETWORKS CORPORATION
Reel/Frame 071722/0721 →
NOTICE OF SUCCESSION OF AGENCY - 5L Recorded Jan 14, 2025
From: UBS AG, STAMFORD BRANCH, AS LEGAL SUCCESSOR TO CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: ANKURA TRUST COMPANY, LLC
Reel/Frame 069897/0046 →
NOTICE OF SUCCESSION OF AGENCY - 4L Recorded Jan 14, 2025
From: UBS AG, STAMFORD BRANCH, AS LEGAL SUCCESSOR TO CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: ANKURA TRUST COMPANY, LLC
Reel/Frame 069896/0827 →
SECURITY INTEREST Recorded Dec 7, 2018
From: MITEL NETWORKS ULC
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 047741/0674 →
SECURITY INTEREST Recorded Dec 7, 2018
From: MITEL NETWORKS ULC
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 047741/0704 →
RELEASE OF SECURITY INTEREST Recorded Dec 3, 2018
From: CITIZENS BANK, N.A.
To: MITEL NETWORKS CORPORATION
Reel/Frame 048096/0785 →
RELEASE OF SECURITY INTEREST Recorded Mar 25, 2017
From: BANK OF AMERICA, N.A., AS COLLATERAL AGENT; BANK OF AMERICA, N.A., (ACTING THROUGH ITS CANADA BRANCH), AS CANADIAN COLLATERAL AGENT
To: MITEL US HOLDINGS, INC.; MITEL NETWORKS CORPORATION; MITEL (DELAWARE), INC.; MITEL NETWORKS, INC.; MITEL COMMUNICATIONS, INC.; MITEL BUSINESS SYSTEMS, INC.
Reel/Frame 042244/0461 →
SECURITY INTEREST Recorded Mar 23, 2017
From: MITEL NETWORKS CORPORATION
To: CITIZENS BANK, N.A.
Reel/Frame 042107/0378 →
SECURITY INTEREST Recorded May 28, 2015
From: MITEL NETWORKS CORPORATION
To: BANK OF AMERICA, N.A.(ACTING THROUGH ITS CANADA BRANCH), AS CANADIAN COLLATERAL AGENT
Reel/Frame 035783/0540 →
RELEASE OF SECURITY INTEREST Recorded May 1, 2015
From: JEFFERIES FINANCE LLC, AS THE COLLATERAL AGENT
To: MITEL US HOLDINGS, INC.; MITEL NETWORKS CORPORATION; MITEL COMMUNICATIONS INC. FKA AASTRA USA INC.
Reel/Frame 035562/0157 →
SECURITY AGREEMENT Recorded Feb 14, 2014
From: MITEL US HOLDINGS, INC.; MITEL NETWORKS CORPORATION; AASTRA USA INC.
To: JEFFERIES FINANCE LLC, AS THE COLLATERAL AGENT
Reel/Frame 032264/0760 →
RELEASE OF SECURITY INTEREST Recorded Feb 10, 2014
From: BANK OF AMERICA, N.A.
To: MITEL NETWORKS CORPORATION; MITEL US HOLDINGS, INC.
Reel/Frame 032210/0245 →
RELEASE OF SECURITY INTEREST Recorded Feb 6, 2014
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: MITEL NETWORKS CORPORATION; MITEL US HOLDINGS, INC.
Reel/Frame 032167/0464 →
RELEASE OF SECURITY INTEREST Recorded Apr 15, 2013
From: BANK OF NEW YORK MELLON, THE; MORGAN STANLEY & CO. INCORPORATED; MORGAN STANLEY SENIOR FUNDING, INC.
To: MITEL NETWORKS CORPORATION
Reel/Frame 030264/0470 →
SECURITY AGREEMENT Recorded Apr 8, 2013
From: MITEL NETWORKS CORPORATION
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 030186/0894 →
SECURITY INTEREST Recorded Apr 8, 2013
From: MITEL NETWORKS CORPORATION
To: WILMINGTON TRUST, N.A., AS SECOND COLLATERAL AGENT
Reel/Frame 030201/0743 →
RELEASE OF SECURITY INTEREST IN PATENTS Recorded Apr 2, 2013
From: WILMINGTON TRUST, NATIONAL ASSOCIATION FKA WILMINGTON TRUST FSB/MORGAN STANLEY & CO. INCORPORATED
To: MITEL NETWORKS CORPORATION
Reel/Frame 030165/0776 →
RELEASE & DISCHARGE OF SECURITY INTEREST Recorded Oct 21, 2008
From: HIGHBRIDGE INTERNATIONAL LLC/BNY TRUST COMPANY OF CANADA
To: MITEL NETWORKS CORPORATION
Reel/Frame 021794/0510 →
SECURITY AGREEMENT Recorded Sep 13, 2007
From: MITEL NETWORKS CORPORATION
To: MORGAN STANLEY & CO. INCORPORATED
Reel/Frame 019817/0881 →
SECURITY AGREEMENT Recorded Sep 13, 2007
From: MITEL NETWORKS CORPORATION
To: MORGAN STANLEY & CO. INCORPORATED
Reel/Frame 019817/0847 →
SECURITY AGREEMENT Recorded Jul 25, 2005
From: MITEL NETWORKS CORPORATION, A CORPORATION OF CANADA
To: BNY TRUST COMPANY OF CANADA, TRUST COMPANY OF CANADA
Reel/Frame 016891/0959 →
SECURITY AGREEMENT Recorded Jul 18, 2005
From: HIGHBRIDGE INTERNATIONAL LLC
To: MITEL NETWORKS CORPORATION
Reel/Frame 016345/0236 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 14, 2005
From: MITEL KNOWLEDGE CORPORATION
To: MITEL NETWORKS CORPORATION
Reel/Frame 016345/0283 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 19, 2002
From: MOQUIN, PHILIPPE; DEDIEU, STEPHANE
To: MITEL KNOWLEDGE CORPORATION
Reel/Frame 012618/0214 →