Compound membrane and acoustic device using same

• US 8,925,675 B2
• Filed: 09/23/2013
• Issued: 01/06/2015
• Est. Priority Date: 09/26/2012
• Status: Active Grant

• Current Assignee: AAC Technologies Pte Limited (AAC Technologies Holdings Inc.), American Audio Components, Inc.
• Original Assignee: AAC Acoustic Technologies Company Limited, American Audio Components, Inc.
• Inventors: Huang, Xing-Zhi, He, Jing
• Primary Examiner(s): San Martin, Edgardo
• Application Number:
  US14/033,565
• Publication Number:
  US 20140083795A1
• Time in Patent Office: 470 Days
• Field of Search: 181/167, 181/170, 181/171, 181/172, 381/426
• US Class Current: 181/167
• CPC Class Codes: H04R 2307/025 Diaphragms comprising polymeric materials
• CPC Class Codes: H04R 2307/204 Material aspects of the outer suspension of loudspeaker diaphragms
• CPC Class Codes: H04R 7/06 comprising a plurality of sections or layers
• CPC Class Codes: H04R 7/125 comprising a plurality of superposed layers in contact

Abstract

The present disclosure provides a compound membrane and an acoustic device including such a compound membrane. The compound membrane includes a polyetherimide film, and a thermoplastic polyurethance elastomer attached to one surface of the polyetherimide film.

Claims

1. A compound membrane comprising:

a polyetherimide film; and

a thermoplastic polyurethane elastomer attached to one surface of the polyetherimide film; and

wherein the compound membrane comprises a central portion and a peripheral portion surrounding the central portion, the central portion is formed by a single layer of the polyetherimide film and the peripheral portion is formed by the compound of the polyetherimide film and the thermoplastic polyurethane elastomer.

2. An acoustic device comprising:

a compound membrane as described in claim 1.