Etymotic Research, Inc.

Dan Mapes-Riordan

Mead C Killion

Viorel Drambarean

Steve Iseberg

Sumitrajit Dhar

Steve Viranyi

Jonathan Siegel

Anthony J Becker

Chris William Papalias

Certain embodiments provide a hearing testing probe apparatus. The hearing testing probe apparatus includes a probe tube detachably coupled at a first end to a probe body and extending through a center hole in an eartip to align proximate a face of the eartip at a second end. The probe tube includes a plurality of stimulus lumens for receiving and carrying stimulus from the first end of the probe tube for output at the second end of the probe tube. The probe tube includes one or more microphone lumens for receiving and carrying one or more measured responses from the second end of the probe tube to one or more microphones at the first end of the probe tube.

Hearing testing probe apparatus with digital interface

An improved analog-to-digital converter device suitable for use in digital hearing aids, and methods for operating such a device are disclosed. Aspects of the present invention may provide a full 16&#x2013;18 bits (96&#x2013;108 dB) of dynamic range in a digital hearing aid circuit using 14-bit analog-to-digital converters typically available for hearing aid use. An embodiment of the present invention may use two analog-to-digital converters that are clocked by the same sampling trigger. One of the converters may be preceded by an amplifier having, for example, 24 dB of gain, while the other converter may be preceded by an amplifier having 0 dB of gain. The output of the first converter or the output of the second converter may be used, or a combination of the two outputs may be used to produce audio for the hearing aid user, depending upon input signal level.

Dynamic range analog to digital converter suitable for hearing aid applications

Hearing aid having digital damping

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Evanston, IL, United States of America

Dan Mapes-Riordan