Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Archives of Acoustics

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: guinea pigs

Sortuj według:

Ogranicz wyniki do:

Simultaneous Measurement of the DPOAE Signal Amplitude and Phase Changes

Michalski W., Bochnia M., Dziewiszek W.

Archives of Acoustics

2011

Vol. 36, No. 3

499-508

Although the phenomenon of otoacoustic emission has been known for nearly 30 years, it has not been fully explained yet. One kind of otoacoustic emission is distortion product of the otoacoustic emission (DPOAE). New aspects of this phenomenon are constantly discovered and attempts are made to interpret correctly the obtained results. This paper discusses a new method of measuring DPOAE signals based on double phase-sensitive detection, which makes possible a real-time measurement of the DPOAE signal amplitude and phase. The method was applied for measurements of DPOAE signals in guinea pigs. Sample records are presented and the obtained results are discussed.

Effect of surgical drilling on cochlear potentials

Preś K., Pośpiech L., Mazur M., Kubacka M., Rostkowska-Nadolska B., Michalski W.

Archives of Acoustics

2005

Vol. 30, No. 3

309-321

The aim of the experiment was to examine the effect of noise and mechanical vibrations generated during the drilling of the bones surrounding the cochlea on the cochlear microphonics (CM). The experiment was carried out on a group of 40 guinea pigs divided equally into a group to be studied and a control group. In the studied group, CM values were measured three times: immediately after opening the bulla, after 30 minutes of nonstop drilling and two hours later, whereas in the control group they were measured twice: immediately after opening the bulla and 2.5 hours later. In this way the post-drilling shock and the long-term injuries to the cochlea could be studied. A statistical analysis of the obtained results shows that surgical drilling may cause an average decrease of 50-60% in CM values in comparison with the control group.