PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “Recruitment Detection, Audiologic”

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 109 records · Page 6Linked to original sources
PubMed1986

Effects of listening to music with headphones on hearing--especially under noisy conditions.

The purpose of this experiment was to clarify the effects of exposure to music using headphones under noisy conditions on hearing. The most comfortable loudness (MCL) for three kinds of music (Rock, Popular, Japanese songs) decided by two normal hearing subjects was measured under 6 noisy conditions (Train, Subway, Tram, Bus, Underground, Street) in a soundproof room. In the same manner, the MCL of favorite tunes of five subjects were measured. Temporary threshold shift 2 min after exposure (TTS2) to music for 30 min at the highest MCL was obtained. Furthermore, the characteristics such as spectral structures in one-third octave band or level fluctuations (coefficient of variation) were obtained for noise and music and compared. Statistical analysis revealed that MCL in Street was significantly higher than under other conditions and there was no significant differences in MCL among the various types of music. However, the highest MCL was found for Rock. About 20 dB of TTS was observed in one ear and the hazardous of headphones use in noisy conditions was suggested.

Adult↗
PubMed2004

Ozone therapy and pressure-pulse therapy in Ménière's disease.

The aim of this study was to evaluate the usefulness of ozone and pressure-pulse therapies in treating Ménière's disease. Using objective otoacoustic emissions and short-increment sensitivity index (SISI) tests together with subjective anamnesis, we tested 15 patients (8 men, 7 women) who had suffered from Ménière's disease for 1-3 years and had permanent sensorineural hypoacusis; we compared results before and after treatment. We performed ozone therapy and pressure-pulse treatments simultaneously for one 10-minute session each day for 10 consecutive days. After treatment, both otoacoustic-spontaneous and transiently evoked emissions and SISI test results exhibited no statistically significant changes. However, the subjective state of the patients was clearly improved. The frequency, severity of attacks, and tinnitus decreased. The mechanism of such an improvement is discussed.

Administration, Inhalation↗
PubMed1992

Comparison of clinical and real-life judgments of loudness discomfort.

The purpose of this study was to determine the relationship between the loudness discomfort level (LDL) and real-life impressions of loudness discomfort. LDLs were measured with an established procedure for a variety of stimuli including FM tones, speech noise, and stimuli recorded from two real-life environments, in two groups of subjects. Sound pressure level distributions were measured in each of two environments at the time of subject recruitment, and LDLs were subsequently measured. LDLs were then compared to the sound pressure levels measured in each environment, and to the impressions of loudness discomfort which subjects reported through the use of a questionnaire. Results indicated large discrepancies between LDLs and judgments of loudness discomfort in real-life environments. The LDL does not appear to be an accurate predictor of subjects' impression of loudness discomfort and may not be appropriate for setting the SSPL of hearing aids.

Adult↗
PubMedDate not supplied

[Amplitude and time characteristics of latent auditory evoked potentials in occupational hearing disorders with and without the recruitment phenomenon].

Cortical evoked potentials (CEP) of workers exposed to industrial noise were recorded by an Amplaid MK-6 unit (Italy). They suffered from neurosensory hypoacusis with or without the recruitment phenomenon. The results were compared with those derived from patients with neurosensory hypoacusis of vascular origin, aggravated by the recruitment phenomenon, and in the cortical structures of the hearing organ in the case of neurosensory hypoacusis of both vascular and noise origin. Increase of the N2 with observations made on normal controls who were not exposed to industrial noise. CEP were found to give reliable information about changes peak latency may be used for differential diagnosis of neurosensory hypoacusis of vascular or noise origin. Decrease of the P2--N2 amplitude in response to 1 kHz stimulation may also help discriminate neurosensory hypoacusis of vascular or noise origin.

Acoustic Stimulation↗
PubMed1990

Hearing aids using binaural processing principles.

The performance of normal human hearing in noisy circumstances is helped considerably by its ability to focus on a specific sound source. This ability is derived from the binaural nature of hearing. In this paper we present signal-processing techniques that can partially replace the binaural hearing in situations where a monaural hearing aid is used (monaural deafness, cochlear implants). First, simple noise cancellation and beam forming solutions, which are applicable to speech, are presented. Then full adaptive filter versions and a successful combination of both are proposed. A key element to the success of all these algorithms is the use of a noise versus speech discrimination criterion on which basis selected parts of the adaptive filter structure are adapted at any given moment.

Algorithms↗
PubMed1977

Personal results, trial of classification and standardization in clinical impedancemetry.

The author analyzes the results obtained in clinical impedance testing of 2,799 ears by tympanometry and study of the acoustico-facial reflex. Impedance terminology is discussed and classified in an attempt to bring order to the results. Important findings include the high incidence of negative middle ear pressure in older, profoundly hard-of-hearing children.

Acoustic Impedance Tests↗
PubMed1988

[Quantitative evaluation of hearing disorders in expert assessment. A recent recommendation for calculating the percentage of hearing loss].

A short historical survey is given of grading the severity of hearing disorders and assessing the relevant disability for recompensation purposes according to the tables of Boenninghaus, Röser, and Feldmann. The present situation and the reasons giving rise to dissatisfaction with this procedure are analysed. They are the high threshold of 20% disability for recompensation, the rigidity of the tables, and the technical development of speech audiometry without concomitant adaptation of the tables. The following possible solutions are discussed and rejected: changing the tables, substituting speech audiometry by tone audiometry, speech audiometry with interfering noise, filtered speech audiometry, special bonus for recruitment. The following feasible solution is proposed: Retaining all tables in use up to this time, however, instead of using the sum of discrimination scores which simply adds the scores at 60, 80 and 100 dB SRL, weighting factors are introduced according to the formula [3 x (% at 60 dB) + 2 x (% at 80 dB) + 1 x (% at 100 dB)]: 2 The advantages and the effect of this procedure on calculating hearing loss and disability are discussed.

Audiometry, Pure-Tone↗
PubMed1979

Neurotological studies on Meniere's disease and sudden deafness.

During the period from January 1973 to June 1975, 60 cases with definite Meniere's disease and 30 cases with sudden deafness were listed according to such criteria for the diagnosis of both diseases as determined by the Research Committee of Japan. A neurootological assessment for both diseases were performed in our series. In patients with definite Meniere's disease, hearing impairment was characterized by deficiency in detecting low- and middle-pitched tones and fluctuation of auditory threshold in low frequency range. In sudden deafness, highly impaired hearing loss, i.e., total deafness, was frequently observed (45%). However, recruitment occurred at the same incidence (80%) in both diseases tested. The incidence of spontaneous nystagmus was almost the same regardless of associated vertigo and the course of both diseases. Moreover, it was also recognized that a reduction of caloric responses was a better indication for assessment of the affected ear in both diseases.

Audiometry↗
PubMed1987

External electrical tinnitus suppression: a review.

Our experience with transcutaneous electrical stimulation for tinnitus suppression has been with the Theraband Headset from Audimax Inc. The purpose of this article is to review the highlights of the patients who exhibited tinnitus suppression and/or tinnitus control, and to provide an update of our results and techniques using external electrical stimulation with prolonged stimulation (stage IV). Patient selection is considered critical to the success of external electrical stimulation for tinnitus suppression. The key elements include the clinical finding of a peripheral site of lesion of the tinnitus; positive maskability of the symptom of tinnitus; absence of active ear disease; absence of a vestibular asymmetry; and absence or minimal evidence of dysfunction of the central auditory system. The protocol described for patient selection allows for tinnitus identification, the differentiation of clinical tinnitus types, and the clinical application of the concept of the dynamic range of electrical tinnitus suppression. External electrical tinnitus suppression is believed effective in a limited number of patients clinically identified as having a tinnitus site of lesion primarily peripheral in location and cochlear in type. The present device is not commercially available at this time. Both specific and general suggestions are proposed for the standardization of methods of reporting results of electrical tinnitus suppression and tinnitus control.

Electric Stimulation Therapy↗
PubMed1988

[Diagnosis of central hearing disorders in childhood].

As a contribution to the diagnosis of central auditory disorders in children we developed a series of tests providing a basis for the analysis of auditory perception dysfunctions, offering a detailed description of their symptomatology and thus furnishing a basis for carefully directed measures of treatment. Evaluation criteria necessary for the analysis of tests featuring artificially altered language (band-pass-filtered speech, time-compressed speech, tests with background noise or dichotic speech) are described together with findings obtained from previous investigations. The test series further includes objective audiometric methods and additional tests for the evaluation of auditory perception performance (e.g. phoneme discrimination).

Audiometry↗
PubMed1987

[Rupture of the membrane of the round window in stapes fixation].

A case of sudden deafness is described. Examination showed a mixed deafness on the left side, suspected to be due to fixation of the stapes and a simultaneous perilymph fistula. These lesions were proved by an exploratory tympanotomy. The interesting aspects of the case are emphasized: firstly recruitment caused by a perilymph fistula, present for 5 months without causing complete deafness; secondly improvement of hearing after surgical treatment of both pathological conditions; and finally the complete absence of vestibular signs.

Adult↗