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Extended High Frequency Hearing Thresholds in Tinnitus Patients with Normal Hearing

Ristovska Lidija, Jachova Zora

Archives of Acoustics

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2022

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Vol. 47, No. 4

449--455

EN

The aim of the study was to compare the extended high-frequency (EHF) hearing thresholds (10–16 kHz) in tinnitus and non-tinnitus ears, in a group of 98 patients with unilateral tinnitus and normal hearing at standard audiometric frequencies, in a 0.125–8 kHz range. It was found that a total of 65 patients (66%) had a hearing loss (a threshold shift >20 dB HL) in the EHF range and the EHF hearing loss occurred more frequently in the tinnitus ear than in the non-tinnitus ear. The data also indicate that the EHF thresholds increased with the patient’s age and were in most patients higher in the tinnitus ear than in the non-tinnitus ear.

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Tinnitus Therapy Based on High-Frequency Linearization Principles - Preliminary Results

Poremski T., Kostek B.

Archives of Acoustics

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2012

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Vol. 37, No. 2

161-170

EN

The aim of this work is to present problems related to tinnitus symptoms, its pathogenesis, hypothe- ses on tinnitus causes, and therapy treatment to reduce or mask the phantom noise. In addition, the hypothesis on the existence of parasitic quantization that accompanies hearing loss has been recalled. Moreover, the paper describes a study carried out by the Authors with the application of high-frequency dither having specially formed spectral characteristics. Discussion on preliminary results obtained and conclusions are also contained.

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Localization of Sound Sources in Normal Hearing and in Hearing Impaired People

Niewiarowicz M., Kaczmarek T.

Archives of Acoustics

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2011

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Vol. 36, No. 4

683-694

EN

This article presents results of investigations of the angle of directional hearing acuity (ADHA) as a measure of the spatial hearing ability with a special emphasis on people with hearing impairments. A modified method proposed by Zakrzewski has been used – ADHA values have been determined for 8 azimuths in the horizontal plane at the height of the listeners’ head. The two-alternative-forced-choice method (2AFC), based on a new system of listeners’ responses (left – right instead of no difference – difference in location of sound sources) was the procedure used in the experiment. Investigations were carried out for two groups of subjects: normal hearing people (9 persons) and hearing impaired people (sensorineural hearing loss and tinnitus – 9 persons). In the experiment different acoustic signals were used: sinu- soidal signals (pure tones), 1/3 octave noise, amplitude modulated 1/3 octave noise, CCITT speech and traffic noises and signals corresponding to personal character of tinnitus for individual subjects. The results obtained in the investigations showed, in general, a better localization of the sound source for noise type signals than those for tonal signals. Inessential differences exist in ADHA values for particular signals between the two groups of subjects. On the other hand, significant differences for tinnitus signals and traffic noise signals were stated. A new system of listeners’ responses was used and appeared efficient (less dispersion of results compared to the standard system).

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Multimedia applications for the hearing impaired

Czyżewski A., Skarżyński H.

Archives of Acoustics

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2007

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Vol. 32, No. 3

491--504

EN

Hearing impairment is one of the fastest growing diseases of modern society. Therefore it is very important to develop new methods for diagnosis and therapy of hearing disorders. Some of them were introduced to practice as a result of a co-operation between institutions mentioned in the header. The system for mass-scale hearing screening is one of multimedia programs for testing communication senses introduced by the authors. The further developments include among others an application of dithering theory to practical solutions for tinnitus patients and a method of fitting hearing aids employing soft computing. The implemented hearing diagnostic & therapy applications and systems with their underlying concepts are reviewed in this paper.