Abstract: A diagnostic system for recording auditory steady-state responses of a person comprises a) a stimulation unit for providing an acoustic stimulus signal to an ear of the person, and b) a recording unit for recording the auditory steady-state responses of the person origination from said acoustic stimulus signal, wherein the stimulation unit is configured to provide that the acoustic stimulus signal comprises a speech-like stimulus provided as a combination of a series of individual frequency-specific stimuli, each having a specified, e.g. predetermined, frequency bandwidth, presentation rate, amplitude and amplitude-modulation. The application further relates to a combined system comprising a diagnostic system and a hearing aid. The invention may e.g. be used for diagnostic instruments for verifying the fitting of a hearing aid.

Abstract: An instrument configured to test the middle-ear function of a test subject, such as in tympanometry and impedance audiometry is provided.

Abstract: A system for validation of a hearing aid performance, especially in small children is disclosed. The validation of the performance of hearing aids after having being fitted to a small child who is not able to subjectively provide responses to sounds presented to the child via the hearing aids, is instead done in an objective manner, by using a naturally occurring signal, which has been modulated in order to create an ASSR evoking speech stimulus which is not considered as noise by a hearing aid.

Abstract: A system for validation of a hearing aid performance, especially in small children is disclosed. The validation of the performance of hearing aids after having being fitted to a small child who is not able to subjectively provide responses to sounds presented to the child via the hearing aids, is instead done in an objective manner, by using a naturally occurring signal, which has been modulated in order to create an ASSR evoking speech stimulus which is not considered as noise by a hearing aid.

Abstract: The present disclosure relates to a device and method for detection and compensation for an oblique ear-probe insertion in especially hearing testing diagnostic setups. More particularly the disclosure relates to detecting an oblique probe insertion from an ear-probe measurement and estimated characteristic impedances and compensate for its effect on the ear-canal reflectance.

Abstract: The present application relates to a spectro-temporal modulation (STM) detection test unit comprising a stimulus generation unit comprising at least one output unit configured to present a first probe stimulus to one ear of a user and to present a second probe stimulus to another ear of the user, an analysis unit configured to determine, in response to presenting the probe stimuli, a modulation-detection threshold of the user, where the stimulus generation unit being configured to generate each of the first probe stimulus and the second probe stimulus based on a carrier signal with a spectro-temporal modulation added, and where the spectro-temporal modulation of the first probe stimulus is different from the spectro-temporal modulation of the second probe stimulus. The present application further relates to a system and a method.

Abstract: An ear probe assembly comprising a housing structure and a first transducer and a second transducer arranged in said housing structure is disclosed. The ear probe assembly further comprising a channel structure comprising at least a first transducer entrance and a second transducer entrance configured to receive first and second sound ports of the transducers, where further a tip portion is configured to engage with the channel structure in a detachable manner.

Abstract: An ear probe assembly comprising a housing structure and a first transducer and a second transducer arranged in said housing structure is disclosed. The ear probe assembly further comprising a channel structure comprising at least a first transducer entrance and a second transducer entrance configured to receive first and second sound ports of the transducers, where further a tip portion is configured to engage with the channel structure in a detachable manner.

Abstract: A system for validation of a hearing aid performance, especially in small children is disclosed. The validation of the performance of hearing aids after having being fitted to a small child who is not able to subjectively provide responses to sounds presented to the child via the hearing aids, is instead done in an objective manner, by using a naturally occurring signal, which has been modulated in order to create an ASSR evoking speech stimulus which is not considered as noise by a hearing aid.

Abstract: The present application relates to an electrophysiologically based Spectro-Temporal Modulation (STM) test unit. The STM test unit comprises an STM stimulus generating unit, an output unit, wherein the STM stimulus generating unit is configured to provide STM test stimuli comprising at least one STM probe stimulus to a user via the output unit according to a predetermined STM test protocol. The STM test unit further comprises one or more electrodes for measuring electrophysiological responses of the user, and an analysis unit configured to analyse the recorded electrophysiological responses of the user measured in response to the provided stimuli. The present application further relates to a method of electrophysiologically based STM testing of a user.

Abstract: A system for validation of a hearing aid performance, especially in small children is disclosed. The validation of the performance of hearing aids after having being fitted to a small child who is not able to subjectively provide responses to sounds presented to the child via the hearing aids, is instead done in an objective manner, by using a naturally occurring signal, which has been modulated in order to create an ASSR evoking speech stimulus which is not considered as noise by a hearing aid.

Abstract: The present application relates to a system for diagnosing cochlear hydrops of a person or an animal. The system comprises an acoustic stimulus generating unit comprising a stimulus generator and an output transducer, where the acoustic stimulus generating unit is configured to provide an audio stimulus by the stimulus generator to at least one of the ears of the person or animal via the output transducer, wherein the acoustic stimulus generating unit is configured to provide a plurality of audio stimuli comprising at least a first click audio stimulus and a first chirp audio stimulus or at least a first and a second chirp audio stimuli, a recording unit configured to record one or more auditory electrophysiological response of the person or animal in response to the one or more audio stimulus being provided by the acoustic stimulus generating unit to at least one of the ears of the person or animal, and a diagnostic unit configured to process the recorded ABR.

Abstract: A diagnostic system for recording auditory steady-state responses of a person comprises a) a stimulation unit for providing an acoustic stimulus signal to an ear of the person, and b) a recording unit for recording the auditory steady-state responses of the person origination from said acoustic stimulus signal, wherein the stimulation unit is configured to provide that the acoustic stimulus signal comprises a speech-like stimulus provided as a combination of a series of individual frequency-specific stimuli, each having a specified, e.g. predetermined, frequency bandwidth, presentation rate, amplitude and amplitude-modulation. The application further relates to a combined system comprising a diagnostic system and a hearing aid. The invention may e.g. be used for diagnostic instruments for verifying the fitting of a hearing aid.

Abstract: The application relates to a method for recording auditory steady-state responses responses of a person, the method comprising a) providing an acoustic stimulus signal to an ear of the person, b) recording the auditory steady-state responses of the person originating from said acoustic stimulus signal. The application further relates to a system. The object of the present application is to excite the auditory system with a signal capable of assessing the auditory systems ability to process speech. The problem is solved in that the acoustic stimulus signal comprises a speech-like stimulus provided as a combination of a series of frequency-specific stimuli, each having a specified (e.g. predetermined) frequency bandwidth, presentation rate, amplitude and amplitude-modulation. An advantage of the disclosure is that it allows a clinical assessment of the effect of a hearing device in a normal mode of operation, i.e. when processing speech stimuli. The invention may e.g.

Abstract: The present disclosure relates to a device and method for detection and compensation for an oblique ear-probe insertion in especially hearing testing diagnostic setups. More particularly the disclosure relates to detecting an oblique probe insertion from an ear-probe measurement and estimated characteristic impedances and compensate for its effect on the ear-canal reflectance.

Abstract: A system for validation of a hearing aid performance, especially in small children is disclosed. The validation of the performance of hearing aids after having being fitted to a small child who is not able to subjectively provide responses to sounds presented to the child via the hearing aids, is instead done in an objective manner, by using a naturally occurring signal, which has been modulated in order to create an ASSR evoking speech stimulus which is not considered as noise by a hearing aid.

Abstract: A method for carrying out acoustic Thevenin calibration of probes or hearing aids comprises presenting a plurality of different acoustic loads, one acoustic load at a time, to the output of the probe or hearing aid, the source characteristic of which is to be determined. Each of the acoustic loads is characterized by a known acoustic input impedance and an additional frequency dependent complex correction factor ?Z(f). By applying the method according to the present disclosure the relationship between the sound pressure and the volume velocity at the input of the acoustic load generated by the probe can be determined for a plurality of frequencies, thereby obtaining the substantially correct source characteristic of the probe or a hearing aid. Specifically the acoustic loads are the input impedance of respective waveguides or other suitable cavities, and the known acoustic input impedances are determined analytically.

Abstract: An ear probe assembly comprising a housing structure and a first transducer and a second transducer arranged in said housing structure is disclosed. The ear probe assembly further comprising a channel structure comprising at least a first transducer entrance and a second transducer entrance configured to receive first and second sound ports of the transducers, where further a tip portion is configured to engage with the channel structure in a detachable manner.

Abstract: The present disclosure relates to a method for estimating one or more compensation parameters from impedance measurements of an acoustic load. The method comprises a series of steps including providing a probe assembly measurement setup and the disclosure also relates to a system to perform impedance measurements. The compensation parameters are estimated through a minimization process, preferably minimizing an error estimate of a first real and second imaginary part of the reflectance. The resulting compensation parameters are used to restore causality of the reflectance and accordingly provide more accurate impedance measurements.

Abstract: The present disclosure relates to a method and system for determining the sensitivity of a first microphone, the method comprising providing an acoustic coupler having at least one internal cavity configured such that a sound field can be generated within the cavity, the cavity being further in acoustic communication with a reference microphone configured to measure the reference sound pressure at a given position in said cavity, the cavity being further provided with an inlet opening configured to establish acoustic communication between the sound inlet of said first microphone, the sensitivity of which is to be determined.