Time and Frequency Characteristics of Temporary Threshold Shifts Caused by Pure Tone Exposures

2011 ◽  
Vol 97 (5) ◽  
pp. 809-818 ◽  
Author(s):  
Rodrigo Ordoñez ◽  
Dorte Hammershøi
Keyword(s):  
Mathematical Model ◽  
Short Duration ◽  
Pure Tone ◽  
Narrow Band ◽  
Frequency Characteristics ◽  
Auditory Function ◽  
Recovery Curve ◽  
Time Frequency ◽  
Band Noise ◽  
Pure Tones

The time-frequency characteristics of Temporary Threshold Shifts (TTS) caused by pure tones were determined using the Békésy audiometric method with narrow-band noise of short duration as the probe stimuli. Two experiments were done using exposures of 3 min at 100 dB above threshold. In the first experiment, the frequency dependent characteristics of TTS produced by a 500-Hz tone were assessed. Thresholds were determined from 0.25 to 2 kHz in 1/2-octave steps for up to 20 min after the exposure. The results showed that the maximum affected frequency was 1/2 octave above the exposure frequency. In the second experiment, the TTS recovery curve produced by a 1-kHz pure tone exposure was assessed at 1.5 kHz, at approximately 15 s intervals for the first 5 min and at regularly increasing intervals up to 45 min after the exposure. The results showed a maximum in the recovery around 2 min after the exposure. The data gathered in these experiments were used to construct a mathematical model of TTS recovery. The model describes both the 1/2-octave shift and the 2-min bounce and it can be used in the comparison of temporary changes in the auditory function, assessed at different times and frequencies.

Spread-of-Masking Effects on Pure Tones and Several Speech Stimuli

1973 ◽  
Vol 16 (3) ◽  
pp. 385-396
Author(s):  
Richard H. Wilson ◽  
Richard W. Stream ◽  
Donald D. Dirks
Keyword(s):  
Pure Tone ◽  
Narrow Band ◽  
Wide Band ◽  
Intensity Level ◽  
Speech Stimuli ◽  
Intensity Range ◽  
Speech Spectrum ◽  
Series Of Experiments ◽  
Pure Tones ◽  
Upper Slope

A series of experiments was performed to study the upward-spread-of-masking phenomena as it pertains to pure-tone and speech stimuli. In the initial two experiments, three maskers were employed over a 40–60-dB intensity range. They included a wide band (50–5500 Hz), a speech spectrum (50–1000 Hz), and a narrow-band (50–950 Hz) noise. All filter slopes were 48 dB/octave, except for the upper slope of the speech-spectrum noise that was 6 dB/octave. In the first experiment, pure-tone thresholds obtained by a tracking procedure revealed no spread of masking when the wide-band and speech-spectrum maskers were used. Substantial spread-of-masking effects, characterized by nonlinear threshold increments outside the spectrum of the masker, were observed with the narrow-band masker. The second experiment included three types of speech stimuli (PBs, spondees, and synthetic sentences) under the same mask conditions used with the pure tones. Threshold shifts observed for the wide- and speech-spectrum maskers were linear with the masking intensity level. However, increased shifts, attributable to spread of masking, were observed with the narrow band and progressed nonlinearly as a function of the masking level. Finally, two additional experiments, performed with two different narrow-band maskers and spondee words, provided insightful information regarding the effects of the spread of masking on speech stimuli.

scholarly journals Choice of test stimulus matters for pitch matching performance: Comparison between pure tone and narrow band noise

2019 ◽  
Vol 381 ◽  
pp. 107776 ◽  
Author(s):  
Andreas Wollbrink ◽  
Christian Dobel ◽  
Vasiliki Salvari ◽  
Evangelos Paraskevopoulos ◽  
Christian Kisker ◽  
...  
Keyword(s):  
Test Stimulus ◽  
Pure Tone ◽  
Narrow Band ◽  
Performance Comparison ◽  
Pitch Matching ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Matching Performance

How Well Mobile Phone App DecibelX Measures Noise and the Usability Study

2019 ◽  
Author(s):  
Ravinder Thaper ◽  
Murray Gibson ◽  
Mathew Reed ◽  
Wallace Morris ◽  
Aravind Reddy Putta
Keyword(s):  
Pure Tone ◽  
Narrow Band ◽  
Sound Level ◽  
Smartphone App ◽  
Usability Study ◽  
Sound Level Meter ◽  
Noise Levels ◽  
Traditional Use ◽  
Band Noise ◽  
Level Meter

This study aims to assess using a smartphone app (DecibelX), as a noise measuring alternative to the more costly traditional use of measuring noise levels with a Sound Level Meter (SLM). The study compares the accuracy of the app to readings taken with a SLM and dosimeter, and also evaluates the app’s performance for pure tone and narrow band noise. And a usability study identifies strengths and weaknesses related to usability of the app.

scholarly journals The Onomatopoetic Expression of Each Frequency Sound from the Pure Tone Audiometer in Normal Hearing Persons： (2) About the Narrow-Band Noise

2007 ◽  
Vol 18 (1) ◽  
pp. 65-71
Author(s):  
Kyong-Myong Chon ◽  
Eui-Kyung Goh ◽  
Soo-Keun Kong ◽  
Jung-Hoon Lee ◽  
Jin-Dong Kim
Keyword(s):  
Pure Tone ◽  
Narrow Band ◽  
Normal Hearing ◽  
Frequency Sound ◽  
Narrow Band Noise ◽  
Band Noise

Masking of narrow‐band noise by pure tone

1974 ◽  
Vol 56 (S1) ◽  
pp. S37-S37
Author(s):  
I. M. Young ◽  
C. H. Wenner
Keyword(s):  
Pure Tone ◽  
Narrow Band ◽  
Narrow Band Noise ◽  
Band Noise

Comparing pure tone and narrow band noise to measure tonal tinnitus pitch-match frequency

2020 ◽  
Author(s):  
Daniela Korth ◽  
Andreas Wollbrink ◽  
Cosima Lukas ◽  
Daniela Ivansic ◽  
Orlando Guntinas-Lichius ◽  
...  
Keyword(s):  
Pure Tone ◽  
Narrow Band ◽  
Narrow Band Noise ◽  
Band Noise

Narrow-Band Noise Audiometry for Hard-to-Test Patients

1970 ◽  
Vol 13 (1) ◽  
pp. 74-81 ◽  
Author(s):  
Jay W. Sanders ◽  
Anne Forrest Josey
Keyword(s):  
Pure Tone ◽  
Narrow Band ◽  
Pure Tone Audiometry ◽  
Mentally Retarded ◽  
Noise Band ◽  
Validity And Reliability ◽  
Hearing Sensitivity ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Listening Task

This study investigated the applicability, validity and reliability of narrow bands of white noise as test stimuli for obtaining audiograms under earphones with hard-to-test patients. The noise bands used were those produced by a commercially available narrow-band masking noise generator. The noise bands were calibrated re the 1964 ISO standard for pure tones with a group of normal hearers. Test results for a group of hearing-impaired children and for a group of mentally retarded children suggest that validity and reliability are better for noise-band audiometry than for pure-tone assessment in such subjects. The results with the mentally retarded group suggest that the task of attending to narrow-band noise stimuli is easier than the pure-tone listening task and is therefore applicable with a larger population of hard-to-test patients than is pure-tone audiometry. The noise-band procedure retains the advantages of pure tone audiometry in that it can be used as a means of monaural assessment of hearing sensitivity by frequency; and, like pure-tone audiometry, it tests functional hearing rather than peripheral sensitivity.

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