Abstract: A hearing aid is provided which comprise an audio signal input device (11), a signal processor (12) a signal output device (13) which presents a processed audio signal perceivable as sound to an ear of a user, where the signal processor comprises fast acting level estimators (8) and slow acting level estimators (8). According to the invention the fast acting level estimators has attack time constants around 10 ms, and release time constants in the range from 25 ms to 250 ms, and are implemented in a number of frequency bands not exceeding 8 bands and preferably 4 frequency bands, the slow acting level estimators (7) have attack time constants around 10 ms, and release time constants which are 4 to 5 times the release time constants of the fast acting level estimators (8), and are implemented in a number of frequency bands comprising no less than 10 bands and preferably 16 frequency bands.

Abstract: This invention relates to a system (100) for controlling gain function of a hearing aid. The system (100) comprises a microphone (102) converting a sound pressure to an input signal, a speaker (112) converting an output signal to a processed sound pressure, and a signal processing means (106) interconnecting the microphone (102) and the speaker (112) and processing the input signal to the output signal according to a control signal. The system (100) further comprises a signal analysis means (108) connecting to the microphone (102) and to the signal processing means (106) and comprising a controller means (124) generating the control signal based on detector means (128, 130, 120) responses to the input signal.

Abstract: A digital hearing aid system includes a signal path with an input transducer, a signal processor and an output transducer, a part of the system being intended for delivering sound into an ear canal of a hearing aid user leaving the ear canal with an unobstructed cross-sectional area corresponding to a vent channel with a diameter of at least 3 mm or a total area of at least 7.07 mm2. The signal path is designed to have a signal delay less than 15 ms. The hearing aid signal path furthermore preferably includes means for providing an adaptive feedback compensation. The signal processor is adjusted to provide increased gain in low frequency areas.

Abstract: This invention relates to a system (300) for measuring acoustic properties of a vent (126) in a hearing aid. The system (300) comprises: a microphone (202) converting ambient sound pressure to an electric sound signal; a signal processing unit (302) connected to the microphone (202) and generating a processed electric sound signal; and a speaker (204) converting the processed electric sound signal to a processed sound pressure. In addition, the system comprises a determining means, which is adapted to determine the acoustic properties by measuring the acoustic feedback from the speaker 204 to the microphone (202).

Abstract: The present invention relates to a hearing aid logging data and learning from these data.

Abstract: The invention relates to a digital hearing aid system comprising a signal path with an input transducer, a signal processor and an output transducer, where a part of the system is intended for delivering sound into an ear canal of a hearing aid user, where this part leaves the ear canal with an non obstructed cross sectional area corresponding to a vent channel with a diameter of at least 3 mm, and where the signal path is designed to have a signal delay less than 8 ms. Preferably the hearing aid signal path furthermore comprises means for providing an adaptive feedback compensation. Furthermore the signal processor is adjusted to provide increased gain in low frequency areas.