Interaural pitch perception difference: dependence upon internal and external factors.

Tone pulses were presented consecutively to one and the other ear in normally hearing musicians. The frequency of pulses in one, reference ear was fixed. That in the other, test ear varied to achieve the same pitch of tones in both ears.

Reflection of bounce phenomenon in TEOAE in humans: dependence upon exposure parameters.

The bounce phenomenon is an alteration of hearing acuity after presentation of loud tones. Generally, it implies the improvement in hearing acuity that followed by the worsening. The dependence of the bounce upon exposure stimulus parameters has been evaluated in the present study.

Rotational tomography of the normal and reconstructed middle ear in temporal bones: an experimental study.

Imaging is an essential diagnostic tool in reconstructive middle ear surgery, especially in pre-operative planning. Due to ongoing improvement of imaging quality and development of new imaging techniques like e.g.

Titanium clip prosthesis.

Objective: Prostheses for the reconstruction of a defective ossicular chain should be stable and firmly anchored to the ossicular remnants. This will prevent a defective connection from causing diminished sound transmission efficiency and will keep the prosthesis from tilting or even losing contact, which would result in a sound transmission block. Through temporal bone experimentation, we have consequently developed a very lightweight titanium prosthesis, which is fastened onto the stapes head with a clip mechanism.

Movements of cochlear implant electrodes inside the cochlea during insertion: an x-ray microscopy study.

Background: There are no satisfactory, noninvasive techniques currently available to visualize the cochlear implant (CI) electrode in a dynamic state as it is advanced inside the cochlea.

Objective: This study describes a radiologic technique that can be used in temporal bones to monitor the electrode position in real time and to visualize the basilar membrane.

Methods: A cochleostomy was performed in accordance with the normal procedure for cochlear implantation in seven fresh cadaveric temporal bones.

Biomechanical aspects in implantable microphones and hearing aids and development of a concept with a hydroacoustical transmission.

The middle ear functions as a sensitive pressure receptor. This implies that it not only transmits sound pressure waves with molecule-sized vibrational amplitudes, but that it also reacts to the million times larger variations of ambient air pressure. This pressure induces movements of the tympanic membrane and of the attached ossicular chain of up to 1,000 microm.