摘要:
A method for providing hearing assistance to a user by capturing input audio signals; estimating a speech level of the input audio signals and an ambient noise level of the input audio signals; applying a gain model to the input audio signals to transform the input audio signals into filtered audio signals, wherein, for a each ambient noise level, the gain varies as a function of the speech level and wherein the function varies according to the ambient noise level changing the ratio of the gain at low speech levels and at high speech levels as a function of the ambient noise level; wirelessly transmitting the filtered audio signals to a receiver unit forming or being connected to a user hearing stimulator, the stimulator being worn at or in the user's ear; and stimulating the user's hearing by the stimulator according to audio signals supplied by the receiver unit.
摘要:
A method for providing hearing assistance to a user by capturing input audio signals; estimating a speech level of the input audio signals and an ambient noise level of the input audio signals; applying a gain model to the input audio signals to transform the input audio signals into filtered audio signals, wherein, for a each ambient noise level, the gain varies as a function of the speech level and wherein the function varies according to the ambient noise level changing the ratio of the gain at low speech levels and at high speech levels as a function of the ambient noise level; wirelessly transmitting the filtered audio signals to a receiver unit forming or being connected to a user hearing stimulator, the stimulator being worn at or in the user's ear; and stimulating the user's hearing by the stimulator according to audio signals supplied by the receiver unit.
摘要:
A system for speech enhancement in a room having a directional lapel microphone arrangement for capturing an audio signal from a speaker's voice; audio signal processor for generating a processed audio signal from the captured audio signal, and an adaptive beamformer unit for imparting directivity to the microphone arrangement provides maximum sensitivity towards the speaker's mouth and minimum sensitivity towards noise sources identified by the beamformer unit. A unit shifts the frequency of components of the audio signal above a frequency threshold value only. A feedback cancelling unit has an adaptive filter and a selection unit which automatically switches between a first mode causing the audio signal to by-pass the adaptive filter and a second mode in which the audio signal is filtered by the adaptive filter. A loudspeaker arrangement generates sound according to the processed audio signal and has plural loudspeakers arranged to form a directional loudspeaker array.
摘要:
There is provided a method of operating a system for providing hearing assistance to a user (101), comprising: capturing and processing audio signals by a transmission unit (102) and transmitting the audio signals from the transmission unit (102) via a wireless audio link to a receiver unit (103); processing the received audio signals in the receiver unit (103); stimulating the user's hearing, by stimulating means (38, 136) worn at or in the user's ear, according to the audio signals from the receiver unit (103); logging data by recording the values of at least one operation parameter of the transmission unit (102) and/or the receiver unit (103) as a function of time and/or by recording data derived from the values of at least one operation parameter of the transmission unit (102) and/or the receiver unit (103) as a function of time in the transmission unit (102); and reading the logged data from the transmission unit (102).
摘要:
A hearing assistance system, having an audio signal source, a transmission unit for transmitting audio signals from the audio signal source via a wireless right ear audio link to a right ear unit and a receiver unit, and an arrangement for stimulating the user's right ear, and via a wireless left ear audio link, a left ear unit having a receiver unit and an arrangement for stimulating the user's left ear, an arrangement for exchanging audio signals received from the transmission unit between the right and left ear units, a device for detecting the quality of the right and left ear links and an arrangement for selecting, as a function of the detected qualities of the right and left ear links, as input to the stimulating arrangement, the audio signals received by the respective receiver unit from the transmission unit, the audio signals received via the audio signal exchanging arrangement, and/or mixtures thereof.
摘要:
There is provided a method for operating a receiver unit (12) for receiving audio signals from a remote transmission unit (10) via a wireless audio link (56), comprising: connecting an audio signal output (41) of the receiver unit (12) to an audio signal input (42) of a hearing instrument (14A, 14B) comprising means (52) located at a user's ear or in the user's ear canal for stimulating the user's hearing according to the audio signals from the receiver unit (12) and a microphone arrangement (44); measuring by means (34, 38) included in the receiver unit (12) the impedance of the audio signal input (42) of the hearing instrument (14A, 14B); and adjusting the impedance of the audio signal output (41) of the receiver unit (12) according to the measured impedance of the audio signal input (42) of the hearing instrument (14A, 14B).
摘要:
There is provided a method for adjusting a system for providing hearing assistance to a user (101), the system comprising a microphone arrangement (26) for capturing audio signals, a transmission unit (102) for transmitting the audio signals via a wireless link (107) to a receiver unit (103) worn by the user, a gain control unit (126) located in the receiver unit for setting the gain applied to the audio signals, and means (38) worn at or in a user's ear (39) for stimulating the hearing of the user according to the audio signals from the receiver unit (103), said method comprising: generating test audio signals, transmitting said test audio signals at a pre-defined level from the transmission unit via the wireless link to the receiver unit and stimulating the user's hearing with said test audio signals via said stimulating means; simultaneously transmitting gain control commands from the transmission unit to the gain control unit in order to selectively change the gain set by the gain control unit; repeating these steps until an optimum value of the gain set by the gain control unit has been determined; and transmitting a store command from the transmission unit to the receiver unit in order to store that determined optimum value of the gain.
摘要:
There is provided a method for adjusting a system for providing hearing assistance to a user (101), the system comprising a microphone arrangement (26) for capturing audio signals, a transmission unit (102) for transmitting the audio signals via a wireless link (107) to a receiver unit (103) worn by the user, a gain control unit (126) located in the receiver unit for setting the gain applied to the audio signals, and means (38) worn at or in a user's ear (39) for stimulating the hearing of the user according to the audio signals from the receiver unit (103), said method comprising: generating test audio signals, transmitting said test audio signals at a pre-defined level from the transmission unit via the wireless link to the receiver unit and stimulating the user's hearing with said test audio signals via said stimulating means; simultaneously transmitting gain control commands from the transmission unit to the gain control unit in order to selectively change the gain set by the gain control unit; repeating these steps until an optimum value of the gain set by the gain control unit has been determined; and transmitting a store command from the transmission unit to the receiver unit in order to store that determined optimum value of the gain.
摘要:
The present invention relates to a method for determining at least one petroleum characteristic of a geologic sediment sample heated in a non-oxidizing atmosphere and an oxidizing atmosphere. The sample is heated to a first temperature value below 200.degree. C. for a predetermined period of time and then to a second temperature value ranging between 600 and 850.degree. C. according to a temperature gradient between 0.2.degree. C. and 50.degree. C./min. Carbon dioxide and carbon monoxide are continuously measured during the temperature stages in order to determine at least one petroleum characteristic, wherein said petroleum characteristic comprises a quantity of organic oxygen, inorganic oxygen, total organic carbon, or inorganic carbon.
摘要:
A communication system having at least one user worn receiver unit for receiving audio signals via a wireless audio link connected to a stimulating means for stimulating the user's hearing according to audio signals received via the audio link; and a plurality of user worn transmission units and a microphone arrangement for capturing audio signals from the respective user's voice, an audio signal transmission portion for establishing the wireless audio link to at least one receiver unit to transmit the captured audio signals to the at least one receiver unit, an assistive digital link transceiver portion for establishing a bidirectional assistive digital link to at least one of the other transmission units and/or to an external command unit, and a control unit for controlling signal transmission of the transmission unit according to data exchanged with the control unit of the at least one of the other transmission units and/or the external command unit.