Temporary Threshold Shift Reduction as a Function of Contralateral Noise Level

1972 ◽  
Vol 15 (4) ◽  
pp. 792-799 ◽  
Author(s):  
Raymond S. Karlovich ◽  
Barry F. Luterman ◽  
Mary H. Abbs
Keyword(s):  
Wide Band ◽  
Acoustic Stimulation ◽  
Noise Levels ◽  
Contralateral Noise ◽  
Stapedius Muscle ◽  
Band Noise ◽  
Continuous Tone ◽  
Males And Females ◽  
Contralateral Ear ◽  
Wide Band Noise

Seven male and seven female subjects were exposed to a monaurally presented 1000-Hz continuous tone at 110 dB SPL for three minutes. During the exposure pulsed wide-band noise (one second on / one second off) was presented to the contralateral ear. Six noise levels (70, 80, 90, 100, 110, and 115 dB SPL) were used. In addition, a control condition consisting of the absence of contralateral stimulation was used. Pre- and postexposure thresholds were tracked with a Bekesy type procedure for a stimulus one-half octave above the exposure frequency. TTS was greatest for the control condition (no contralateral noise) and became progressively less as the SPL of contralateral noise was increased from 70 to 115 dB. The inverse relation between magnitude of TTS and the level of contralateral noise was attributed to stapedius muscle activity. Hence, the data provided psychophysical support for the contention that the stapedius muscle reflex is graded in response to the level of acoustic stimulation. The data also indicated an absence of significant differences in TTS magnitudes between males and females.

Some Effects of Bone-Conducted Masking

1965 ◽  
Vol 8 (3) ◽  
pp. 253-261
Author(s):  
Zahrl G. Schoeny ◽  
Cornelius P. Goetzinger ◽  
Albert W. Knox
Keyword(s):  
Hearing Loss ◽  
Narrow Band ◽  
Bone Conduction ◽  
Wide Band ◽  
Tone Presentation ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Continuous Tone ◽  
The Difference ◽  
Wide Band Noise

Twenty subjects with normal hearing and 20 subjects with sensori-neural hearing loss were examined relative to the effects of wide- and narrow-band white noise delivered by bone conduction at the forehead; differences between thresholds with interrupted- and continuous-tone presentation under the conditions of quiet, wide-band noise, narrow-band noise; the difference between threshold shifts at 1 000 and 2 000 cps when the SAL masking technique is used; and differences between SAL and conventional bone-conduction thresholds at 1 000 or 2 000 cps. Narrow-band noise produced less shift than wide-band noise under all conditions Differences between interrupted- and continuous-tone presentation yielded better thresholds. Shifts at 1 000 cps and 2 000 cps were significantly different, with the shift at 1 000 cps being greater.

Discrimination of different temporal envelope structures of diotic and dichotic target signals within diotic wide-band noise

2005 ◽  
pp. 397-403 ◽  
Author(s):  
Steven van de Par ◽  
Armin Kohlrausch ◽  
Jeroen Breebaart ◽  
Martin McKinney
Keyword(s):  
Wide Band ◽  
Temporal Envelope ◽  
Band Noise ◽  
Wide Band Noise

On linear filtering under dependent wide-band noise

Stochastics ◽  
1988 ◽  
Vol 23 (4) ◽  
pp. 413-437 ◽  
Author(s):  
A. E. Bashirov
Keyword(s):  
Wide Band ◽  
Linear Filtering ◽  
Band Noise ◽  
Wide Band Noise

Stochastic Averaging of Strongly Nonlinear Oscillators Under Combined Harmonic and Wide-Band Noise Excitations

2008 ◽  
Vol 130 (5) ◽  
Author(s):  
Y. J. Wu ◽  
W. Q. Zhu
Keyword(s):  
Probability Density ◽  
Wide Band ◽  
Nonlinear Oscillators ◽  
Stochastic Averaging ◽  
Random Excitation ◽  
Stationary Response ◽  
Strongly Nonlinear ◽  
Band Noise ◽  
Wide Band Noise ◽  
Strongly Nonlinear Oscillators

Physical and engineering systems are often subjected to combined harmonic and random excitations. The random excitation is often modeled as Gaussian white noise for mathematical tractability. However, in practice, the random excitation is nonwhite. This paper investigates the stationary response probability density of strongly nonlinear oscillators under combined harmonic and wide-band noise excitations. By using generalized harmonic functions, a new stochastic averaging procedure for estimating stationary response probability density of strongly nonlinear oscillators under combined harmonic and wide-band noise excitations is developed. The damping can be linear and (or) nonlinear and the excitations can be external and (or) parametric. After stochastic averaging, the system state is represented by two-dimensional time-homogeneous diffusive Markov processes. The method of reduced Fokker–Planck–Kolmogorov equation is used to investigate the stationary response of the vibration system. A nonlinearly damped Duffing oscillator is taken as an example to show the application and validity of the method. In the case of primary external resonance, based on the stationary joint probability density of amplitude and phase difference, the stochastic jump of the Duffing oscillator and P-bifurcation as the system parameters change are examined for the first time. The agreement between the analytical results and those from Monte Carlo simulation of original system shows that the proposed procedure works quite well.

Pitch Shifts of Tones in Wide‐Band Noise 912–913

1966 ◽  
Vol 40 (5) ◽  
pp. 1203-1203
Author(s):  
Sylvia J. Steiner ◽  
Arnold M. Small
Keyword(s):  
Wide Band ◽  
Band Noise ◽  
Wide Band Noise
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