PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “ACOUSTICS”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 163 records · Page 9Linked to original sources
PubMedDate not supplied

[Influence of the contralateral acoustic stimulation on the acoustic otoemissions: response modulation by the efferent olivocochlear system].

We have correlated in 16 patients (32 ears), the modifications de EOEs before and after sound stimulation of the contralateral ear. The recording of the EOEs has been performed in a sound proof room with ILO 88 from Otodynamics Ltd., the analysis has been made with the ILO 88 V.3.5 software. We have tried to study the modulator rol of the medial efferent coclear system on the external ciliated cells. In the results we observe a decrease of the amplitude in the EOEs when the contralateralmears is stimulated a white noise, in relation with the nonstimulation situation. When pures tones are used contralateral stimulation the decrease in the EOEs amplitude takes place in the same frequency spectrum as the pure tone used.

Acoustic Stimulation↗
PubMedDate not supplied

[The prognostic value of the acoustic stimulation test for fetal wellbeing and neonatal status. Controlled acoustic stimulation of the fetus in the last pregnancy trimester].

Fetal heart frequencies and fetal movements were examined in 57 cases simultaneously by antepartal cardiotocogram and by mothers in the third trimenon of their pregnancy. 163 CTGs were monitored and two different groups defined. One group of 34 healthy newborns was compared with a group of 18 small for gestational age fetuses (birth weight less than 25th percentile of birth weight). The fetal heart rate and movements response to sound stimulation was studied. Fetuses appropriate for gestational age showed significantly higher activity in heart rate accelerations and movements following sound stimulation (1-2 kHz, 120 dB, 20 sec.) compared with the group of SGA fetuses. The study showed that the maternal perception of fetal activity is a suitably complementary method to assess fetal wellbeing. Measuring by maternal perception, it could be demonstrated that fetuses appropriate to gestational age reached a higher activity (16.5 p.c. monitoring period) as compared with 8.0 p.c. of fetal movements registered by mothers in the group of small for gestational age fetuses.

Acoustic Stimulation↗
PubMed1981

Acoustic brain stem response in diagnosis of acoustic neuroma.

The aim of the present investigation is to throw light upon the following question: Is recording of click-evoked brain stem responses (ABR) a more sensitive and reliable test than the oto-neurological and conventional audiological tests in selecting patients for computerized tomography (CT)? Thirty-three patients were examined. They all presented case histories and otoneurological findings indicating a tumor in te cerebellopontine angle. In all cases CT was carried out. A tumor was found in 16 patients, normal findings in 17. The results obtained by audiological and oto-neurological tests were compared to those obtained by ABR recording. It is concluded that recording of ABR and the caloric vestibular test are the most reliable examinations in selecting patients for CT. These examinations alone, are, however, not sufficient to secure a completely reliable selection, and should be supplemented by other audiological tests.

Adult↗