Electroacoustic Sound Transducer Unit and Earphone

• US 20170164091A1
• Filed: 12/06/2016
• Published: 06/08/2017
• Est. Priority Date: 12/08/2015
• Status: Abandoned Application

• Current Assignee: Sennheiser Electronic GmbH & Company KG
• Original Assignee: Sennheiser Electronic GmbH & Company KG
• Inventors: Schunack, David
• Application Number:
  US15/370,176
• Publication Number:
  US 20170164091A1
• Time in Patent Office: Days
• CPC Class Codes: H04R 1/1041 Mechanical or electronic switches, or control elements switches in general H01H
• CPC Class Codes: H04R 1/1075 Mountings of transducers in earphones or headphones
• CPC Class Codes: H04R 9/063 using a plurality of acoustic drivers H04R1/24 and H04R1/403 take precedence

Abstract

There is provided an electroacoustic sound transducer comprising a diaphragm and at least a first and a second coil coupled to the diaphragm so that the first and second coils can vibrate together with the diaphragm. The electroacoustic sound transducer unit has an impedance switching-over unit for connecting together the at least first and second coils to provide a series circuit or a parallel circuit or for contacting the first coil or the second coil.

Claims

1. An electroacoustic sound transducer unit (100) comprising:

a diaphragm;

at least a first coil and a second coil which are each mechanically coupled to the diaphragm so that the first coil and the second coil vibrate together with the diaphragm; and

an impedance switching-over unit configured to set an electrical output impedance of the sound transducer unit by electrically connecting the at least first and second coils;

wherein the impedance switching-over unit further configured to switch over between at least two of the following four possible options;

series connection of the first and second coils;

parallel connection of the first and second coils;

connection only of the first coil; and

connection only of the second coil.

2. The electroacoustic sound transducer unit as set forth in claim 1:

wherein an impedance of the first coil corresponds to an impedance of the second coil.

3. The electroacoustic sound transducer unit as set forth in claim 1:

wherein an impedance of the first coil is different from an impedance of the second coil.

4. An earphone or headset comprising:

at least one electroacoustic sound transducer unit as set forth in claim 1;

wherein the impedance switching-over unit is configured to be operated by a user.

6. Earphones or a headset comprising:

two electroacoustic sound transducer units as set forth in claim 1;

wherein a respective one of the sound transducer units is associated with a respective ear of a user.

7. The earphones or headset as set forth in claim 6:

wherein the impedance switching-over units of the two sound transducer units are configured to effect joint switching-over of the output impedances of the two sound transducer units.

5. An earphone or headset comprising:

an electroacoustic sound transducer having;

a diaphragm; and

at least a first coil and a second coil which are each mechanically coupled to the diaphragm so that the first coil and the second coil vibrate together with the diaphragm; and

an active noise cancellation unit that, based on at least one interference sound detected by a microphone, generates a cancellation signal that is output by way of the first coil;

wherein an audio signal to be reproduced is reproduced by way of the second coil.