Abstract: The hearing device is operable in a fitting mode and in a listening mode and comprises a transducer for receiving, in the fitting mode, audio test signals, and for converting the audio test signals into signals to be perceived by the user in the fitting mode. It comprises a parameter memory means for storing parameter settings, which parameter settings are obtained from user input received through a user interface in response to the signals perceived by the user in the fitting mode. And it comprises a signal processor using the parameter settings for correcting audio signals at least in the listening mode. The user interface is comprised in the hearing device and the hearing device comprises an audio signal source, in which audio signal source the audio test signals are stored or generated.

Abstract: According to the invention, a hearing instrument comprising at least one inner microphone operable to determine a sensing signal representative of an acoustic signal at a position in front of the user's eardrum—which may be an acoustic signal at a position between an ITE (or ITC or CIC) hearing instrument and the eardrum or between an earpiece and the eardrum—is used. In accordance with the invention, in front of the eardrum an acoustic signal is produced. The inner microphone creates a sensing signal representative of the acoustic signal, and the signal processing unit of the hearing instrument determines a characteristic of the user's ear canal based thereon and memorizes values indicative of the characteristic. According to a preferred embodiment, the characteristic is an acoustic coupling transfer characteristic, which is determined based on a comparison of a signal representative of the output signal of the signal processing unit's digital signal processing stage and the sensing signal.

Abstract: The present invention provides a method of providing input parameters for the fitting process of individually shaped or customized hearing devices by storing geometry data during the manufacturing process into data storage and selectively reading out data from this data storage during the manufacturing and/or fitting process of the hearing device. To improve the quality and to reduce the time required for the fitting process, all the data available from the manufacturing process, e.g. the geometry data, may be used during the final fitting process at the dispenser's office.

Abstract: A hearing device has an acoustical/electrical input converter, and electrical/mechanical output converter, and a digital signal processing unit connected between the input converter and output converter. The device is adapted to a specific ear of a specific individual. The signal processing unit is controllable in at least two operating modes. In a first mode, the device is substantially acoustically transparent. The processing unit is controlled in the first mode by a dedicated program module independent of any further program module for any other operating mode. Alternatively the processing unit is controlled in the first mode by a program operating in the first mode controlled by a dedicated set of parameters independent of any further set of parameters for any other operating mode.

Abstract: Acoustic parameters of an ear are recorded by measuring the impedance of the ear canal. A first pressure microphone measures the sonic pressure. A second pressure microphone measures the sonic pressure through a calibrated acoustic resistance. The sound energy flux is determined by the difference between the measured sonic pressures. The impedance is calculated from these results.

Abstract: A probe has an acoustic stimulator, such as a loudspeaker, and a microphone. The probe is located in an area to be measured. Acoustic signals are sent by the stimulator and received by the microphone. The signals received by the microphone are transformed into electrical signals and transferred to an analysis unit. Using a defined stimulation followed by a two-port chain transfer matrix connected to an impedance as a model, the voltage ratio between the stimulation and the impedance is described as a dimensionless transfer function in the form of a complex function of the stimulation frequency. A series of acoustic calibration signals are generated by a number of known acoustic impedances covering different calibration scopes by means of the defined stimulation. The calibration signals are recorded and the electric values are merged with the respective voltage values of the stimulation for evaluation of the results of the respective transfer functions.

Abstract: Acoustic parameters of an ear are recorded by measuring the impedance of the ear canal. A first pressure microphone measures the sonic pressure. A second pressure microphone measures the sonic pressure through a calibrated acoustic resistance. The sound energy flux is determined by the difference between the measured sonic pressures. The impedance is calculated from these results.

Abstract: In the method, a reed (3) for a weaving machine is continuously driven from a drive means (2) and the kinetic energy of the reed is stored in order to reduce the drive energy. The apparatus comprises an energy storer (1) and a drive means (2) in order to move the reed (3) back and forth. The matched oscillatable system formed by the energy storer and the reed reduces the drive torque at the uniformly rotating drive means whereby a reduction of the power consumption results.