| 摘要 |
The application relates to a method of processing audio signals from a sound field picked up by a microphone system of a binaural listening system comprising left and right listening devices adapted for being worn at a left and right ear, respectively, of a user, the sound field comprising sound signals from one or more sound sources, the sound signals impinging on the user from one more directions relative to the user, the left and right listening devices comprising transceivers for establishing a communication link between them. The application further relates to a binaural listening system. The object of the present application is to provide an improved sound localization for a user of a binaural listening system. The problem is solved in that information about a user's hearing ability is used to determine a number of target frequency bands, a dynamic separation of sound signals from the one or more sound sources is performed, and an SNR-measure indicating a strength of a selected signal relative to other signals of the sound field is dynamically determined. A better-ear-effect measure for the left and right listening devices, respectively, is calculated as a difference between the values of the SNR-measure for the selected signal for the left and right listening devices, whereby a number of donor frequency bands of the selected signal, where the better-ear-effect measure for the selected signal - at a given time - is above a predefined threshold value, can be identified. Finally, a donor frequency band of the selected signal is transposed in the left and/or right listening devices to a target frequency band, if a predefined transposition criterion is fulfilled. This has the advantage of providing improved speech intelligibility for a hearing impaired user, which is dynamically adapted to the current acoustic environment of the user. The invention may e.g. be used in hearing aid systems for compensating a user's hearing impairment. |
