INCUS LABORATORIES LIMITED Patent applications |
Patent application number | Title | Published |
20140211970 | EARPHONE ARRANGEMENTS - 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. | 07-31-2014 |
20130022213 | DIGITAL NOISE-CANCELLATION - This invention relates to a device for and method of implementing an ambient noise-cancellation (ANC) circuit that uses digital processing whereby a signal indicative of the ambient noise is converted to digital form, filtered, using a fixed or adaptive digital filter, and then converted back to analogue before sending it to an ear-proximate speaker. In order to address the time delays associated with such processing operations, the analogue-to-digital converter used is associated with a down-sampler, and the arrangement is such that a first part of the filtering is implemented by the down-sampler, and a second part of the filtering is implemented by the digital filter. This reduces group delay by configuring a down-sampler associated with the front end of the analogue-to-digital converter to incorporate selected filter characteristics of the overall ANC filter response, and modifying the subsequent filtering processing stage to compensate for this. | 01-24-2013 |
20120314882 | PRODUCTION OF AMBIENT NOISE-CANCELLING EARPHONES - The invention is intended to facilitate the production of ambient noise- cancelling earphones and, to that end, provides a module ( | 12-13-2012 |