Importance

Loading Importance Indicators...

Abstract

The invention provides earphone arrangements for use with electronic host devices, such as cellular telephone handsets and music storage and reproduction devices, and it provides in particular earphone arrangements with ambient noise cancellation (“ANC”). Typically, in prior arrangements, the complex signal processing required for ANC is carried out in the earphones themselves and/or in a pod connected between the earphones and the host device. The invention configures the processing elements such that the ANC signal-processing function is transferred to an ANC processor incorporated into the host device. A non-volatile electronic data storage device, such as an EPROM, provided in the connection path between the earphones and the host device is configured to store calibratory information, indicative of performance criteria of specific microspeaker and microphone components incorporated into the earphones, required to condition the operation of the ANC processor to compensate for departures from predetermined standards of the performance criteria of either or both components. The earphone arrangement is thus simplified and reduced in cost, and moreover can be manufactured, calibrated and supplied independently of any host device.

Loading the Abstract Image...

First Claim