Effects of periodic rest on hearing loss and cochlear damage following interrupted exposure to high‐frequency noise

1988 ◽  
Vol 84 (S1) ◽  
pp. S75-S76
Author(s):  
W. W. Clark ◽  
B. A. Bohne ◽  
T. J. Reilly
Keyword(s):  
Hearing Loss ◽  
High Frequency ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Cochlear Damage

Development of resistance to hearing loss from high frequency noise

1991 ◽  
Vol 56 (1-2) ◽  
pp. 65-68 ◽  
Author(s):  
Malini Subramaniam ◽  
Pierre Campo ◽  
Donald Henderson
Keyword(s):  
Hearing Loss ◽  
High Frequency ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Development Of Resistance

Tinnitus and Neural Activity

1983 ◽  
Vol 26 (4) ◽  
pp. 629-632 ◽  
Author(s):  
Richard J. Salvi ◽  
William A. Ahroon
Keyword(s):  
Hearing Loss ◽  
Neural Activity ◽  
Auditory Nerve ◽  
High Frequency ◽  
Discharge Rate ◽  
Nerve Fibers ◽  
Spontaneous Discharge ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Discharge Rates

The spontaneous discharge rates of auditory nerve fibers were measured in a group of normal chinchillas and in a group of chinchillas with high-frequency, noise-induced hearing loss. In contrast to normal units, the high-frequency units in the noise-exposed animals tended to have elevated spontaneous discharge rates, high thresholds, and a lack of two-tone inhibition. The change in spontaneous discharge rate across the distribution of nerve fibers is related to models of tinnitus and to human psychophysical data.

Gap Detection as a Function of Stimulus Loudness for Listeners With and Without Hearing Loss

1997 ◽  
Vol 40 (6) ◽  
pp. 1387-1394 ◽  
Author(s):  
Peggy B. Nelson ◽  
Susan Dwyer Thomas
Keyword(s):  
Hearing Loss ◽  
Temporal Resolution ◽  
High Frequency ◽  
Normal Hearing ◽  
Frequency Noise ◽  
Gap Detection ◽  
Detection Ability ◽  
High Frequency Noise ◽  
Wide Range ◽  
Comfortable Loudness

Temporal resolution, or the ability to process rapidly changing stimuli, has been purported to be reduced in some listeners with hearing loss while being described as normal in others. Ensuring stimulus audibility by increasing stimulus levels results in near-normal temporal resolution abilities for many listeners with hearing loss, but may also result in uncomfortably loud stimulus levels. The current study was conducted to describe temporal resolution abilities of listeners with and without hearing loss as a function of stimulus loudness. The gap detection abilities of 8 listeners with normal hearing were compared with those of 8 listeners with mild to moderate hearing losses over a wide range of intensities using a 650-Hz wide high-frequency noise marker. At low intensities, listeners with hearing loss show poor gap detection ability. As intensity increases, most listeners’ performance improves and stabilizes near normal at high loudness and sensation levels. At comfortable loudness, gap detection abilities of listeners with hearing loss are less than at loud levels and are considerably poorer than normal.

Cochlear damage following interrupted exposure to high-frequency noise

1987 ◽  
Vol 29 (2-3) ◽  
pp. 251-264 ◽  
Author(s):  
Barbara A. Bohne ◽  
Lorna Yohman ◽  
Mary M. Gruner
Keyword(s):  
High Frequency ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Cochlear Damage

Case study: Simulation and control of high frequency noise for commercial vehicle cab considering leak

2019 ◽  
Vol 67 (4) ◽  
pp. 315-329
Author(s):  
Rongjiang Tang ◽  
Zhe Tong ◽  
Weiguang Zheng ◽  
Shenfang Li ◽  
Li Huang
Keyword(s):  
High Frequency ◽  
Commercial Vehicle ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Simulation And Control ◽  
And Control

Aerodynamic noise from an asymmetric airfoil with perforated extension plates at the trailing edge

2020 ◽  
pp. 1475472X2097838
Author(s):  
CK Sumesh ◽  
TJS Jothi
Keyword(s):  
High Frequency ◽  
Sound Pressure ◽  
Pore Diameter ◽  
Low Frequency ◽  
Aerodynamic Noise ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Trailing Edge ◽  
High Frequency Noise ◽  
Displacement Thickness

This paper investigates the noise emissions from NACA 6412 asymmetric airfoil with different perforated extension plates at the trailing edge. The length of the extension plate is 10 mm, and the pore diameters ( D) considered for the study are in the range of 0.689 to 1.665 mm. The experiments are carried out in the flow velocity ( U∞) range of 20 to 45 m/s, and geometric angles of attack ( αg) values of −10° to +10°. Perforated extensions have an overwhelming response in reducing the low frequency noise (<1.5 kHz), and a reduction of up to 6 dB is observed with an increase in the pore diameter. Contrastingly, the higher frequency noise (>4 kHz) is observed to increase with an increase in the pore diameter. The dominant reduction in the low frequency noise for perforated model airfoils is within the Strouhal number (based on the displacement thickness) of 0.11. The overall sound pressure levels of perforated model airfoils are observed to reduce by a maximum of 2 dB compared to the base airfoil. Finally, by varying the geometric angle of attack from −10° to +10°, the lower frequency noise is seen to increase, while the high frequency noise is observed to decrease.

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