Abstract: A decorrelator includes a plurality of delay units, wherein each delay unit is configured for receiving a part of a frequency representation being based on an audio signal, wherein each delay unit is configured for delaying the received part to provide a delayed part. The decorrelator includes an envelope shaper configured for receiving and combining signals being based on the delayed parts of the frequency representation. The envelope shaper receives the frequency representation of the audio signal and is configured for adjusting an energy of the delayed parts in respect of the frequency representation of the audio signal. The envelope shaper is configured for providing a combined shaped frequency representation. Transient signal portions are handled by an adapted operation of the decorrelator.

Abstract: An apparatus for synthesizing a spatially extended sound source includes: a spatial information interface for receiving a spatial range indication indicating a limited spatial range for the spatially extended sound source within a maximum spatial range; a cue information provider for providing one or more cue information items in response to the limited spatial range; and an audio processor for processing an audio signal representing the spatially extended sound source using the one or more cue information items.

Abstract: A hearing aid for compensating for an occlusion effect while emitting an acoustic useful signal into an auditory canal of a human ear comprises an earbud that can be inserted into the auditory canal, a speaker for emitting a compensation signal into the auditory canal, a microphone for receiving an error signal from the auditory canal, and a control unit for processing a recorded signal to be emitted. The controller is designed by measuring a nominal secondary path between a speaker and the microphone and determining a transmission function that describes behavior of the nominal secondary path, determining a first requirement as a tolerance band about the transmission function, determining a second requirement as a desired sensitivity function of the hearing aid, designing the controller using an optimization method while simultaneously taking the first and second requirements into consideration, and implementing the controller in the control unit.

Abstract: A technique for reducing acoustic feedback in audio communications includes measuring variations in round-trip delay over an audio signal pathway. The technique varies a delay interval of an adjustable-delay element in real time based on the measured variations in round-trip delay, effectively canceling the delay variations. Further techniques are disclosed for detecting and eliminating howling frequencies which arise as a result of acoustic feedback in the audio signal pathway.

Abstract: A technique for reducing acoustic feedback in audio communications includes measuring variations in round-trip delay over an audio signal pathway. The technique varies a delay interval of an adjustable-delay element in real time based on the measured variations in round-trip delay, effectively canceling the delay variations. Further techniques are disclosed for detecting and eliminating howling frequencies which arise as a result of acoustic feedback in the audio signal pathway.

Abstract: The invention relates to a method for designing a regulator (15, 17) for a hearing aid (1) in order to compensate for the occlusion effect during the emission of an acoustic useful signal into the ear canal (5) of the human ear. The hearing aid (1) has an earbud (8), which can be introduced into the ear canal (5) and which comprises a speaker (2) for emitting a compensation signal (y(t), y?(t)) into the ear canal (5) and a microphone (3) for capturing an error signal (e(t)) from the ear canal (5), and a control unit (9) for processing the signal to be emitted and the captured signal.