Acoustic compliance adjuster
AssigneeSony Ericsson Mobile Communications AB
InventorsDan Edgren, Markus Mimer
Life of this patent
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Abstract
A speaker arrangement is described, suitable for improving the sound quality of a small size first speaker. The arrangement comprises a cavity, to which the first speaker is acoustically coupled. A second speaker is also acoustically coupled to the cavity, and the first and second speakers are excited in phase with each other. The first speaker may be an earphone speaker tuned to be held to a user's ear, whereas the second speaker may be a larger ring alert speaker with lower compliance than the first speaker, both of which are incorporated in the same mobile phone. By exciting the second speaker in phase with the first speaker, the second speaker will aid the smaller first speaker's reproduction of sound, particularly in the lower frequency range.
Claims24
A speaker arrangement, comprising:
- a cavity, defined by a number of boundary walls,
- a first speaker having one side acoustically coupled to the cavity;
- a second speaker having one side acoustically coupled to the cavity;
- a speaker signal generator device connected to excite the first speaker and the second speaker in phase with each other.
A mobile phone, comprising:
- a housing;
- a cavity defined within the housing by a number of boundary walls;
- a first speaker within the housing, having a first output side coupled to a first opening in the housing, and a first backside acoustically coupled to the cavity;
- a second speaker within the housing, having a second output side coupled to a second opening in the housing, and a second backside acoustically coupled to the cavity;
- a speaker signal generator device connected to excite the first speaker and the second speaker in phase with each other.
A test rig for measuring acoustic quality of a speaker arrangement, including:
- an acoustic device comprising
- a housing;
- a first speaker within the housing, having a first output side coupled to an opening in the housing, the first speaker being configured to transmit sound to a user's ear placed over the aperture;
- an artificial ear device comprising:
- a cavity defined by boundary walls;
- an opening in a boundary wall shaped to fit with sealed engagement over the aperture in the housing;
- a second speaker having a second output side acoustically coupled to the cavity;
- a speaker signal generator device connected to excite the first speaker and the second speaker in phase with each other.
Dependencies are inferred from the claim text.