Mode coupling and sound field variability in near-coastal area in the presence of internal Kelwin waves

2021 ◽  
Vol 149 (4) ◽  
pp. A22-A22
Author(s):  
Ernest Uzhansky ◽  
Andrey Lunkov ◽  
Boris Katsnelson
Keyword(s):  
Coastal Area ◽  
Mode Coupling ◽  
Sound Field ◽  
Field Variability

Sound field variability: Some measurements from the cat

1964 ◽  
Vol 17 (3) ◽  
pp. 332-334 ◽  
Author(s):  
F. Blair Simmons ◽  
Dana L. Beatty
Keyword(s):  
Sound Field ◽  
Field Variability

Sound field temporal fluctuations due to mode coupling in shallow water with internal soliton

2005 ◽  
Vol 118 (3) ◽  
pp. 2003-2004
Author(s):  
Mohsen Badiey ◽  
Valery Grigorev ◽  
Boris Katsnelson ◽  
James Lynch
Keyword(s):  
Shallow Water ◽  
Mode Coupling ◽  
Sound Field ◽  
Temporal Fluctuations ◽  
Internal Soliton

scholarly journals Sound field variability in the presence of an Internal Kelvin Wave in the Sea of Galilee

2019 ◽  
Author(s):  
Ernst Uzhansky ◽  
Boris Katsnelson ◽  
Andrey Lunkov ◽  
Ilia Ostrovsky
Keyword(s):  
Sound Field ◽  
Kelvin Wave ◽  
Field Variability ◽  
Internal Kelvin Wave

Decay of Temporary Threshold Shift in Noise

1973 ◽  
Vol 16 (2) ◽  
pp. 267-270 ◽  
Author(s):  
John H. Mills ◽  
Seija A. Talo ◽  
Gloria S. Gordon
Keyword(s):  
Sound Field ◽  
Threshold Shift ◽  
Temporary Threshold Shift ◽  
Octave Band ◽  
Band Noise ◽  
Lower Asymptote

Groups of monaural chinchillas trained in behavioral audiometry were exposed in a diffuse sound field to an octave-band noise centered at 4.0 k Hz. The growth of temporary threshold shift (TTS) at 5.7 k Hz from zero to an asymptote (TTS ∞ ) required about 24 hours, and the growth of TTS at 5.7 k Hz from an asymptote to a higher asymptote, about 12–24 hours. TTS ∞ can be described by the equation TTS ∞ = 1.6(SPL-A) where A = 47. These results are consistent with those previously reported in this journal by Carder and Miller and Mills and Talo. Whereas the decay of TTS ∞ to zero required about three days, the decay of TTS ∞ to a lower TTS ∞ required about three to seven days. The decay of TTS ∞ in noise, therefore, appears to require slightly more time than the decay of TTS ∞ in the quiet. However, for a given level of noise, the magnitude of TTS ∞ is the same regardless of whether the TTS asymptote is approached from zero, from a lower asymptote, or from a higher asymptote.

Modified Earpieces and CROS for High Frequency Hearing Losses

1968 ◽  
Vol 11 (1) ◽  
pp. 204-218 ◽  
Author(s):  
Elizabeth Dodds ◽  
Earl Harford
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
High Frequency ◽  
Hearing Aid ◽  
Sound Field ◽  
Intensity Level ◽  
Test Results ◽  
High Frequency Hearing Loss ◽  
Increased Sensitivity ◽  
Difficult Cases

Persons with a high frequency hearing loss are difficult cases for whom to find suitable amplification. We have experienced some success with this problem in our Hearing Clinics using a specially designed earmold with a hearing aid. Thirty-five cases with high frequency hearing losses were selected from our clinical files for analysis of test results using standard, vented, and open earpieces. A statistical analysis of test results revealed that PB scores in sound field, using an average conversational intensity level (70 dB SPL), were enhanced when utilizing any one of the three earmolds. This result was due undoubtedly to increased sensitivity provided by the hearing aid. Only the open earmold used with a CROS hearing aid resulted in a significant improvement in discrimination when compared with the group’s unaided PB score under earphones or when comparing inter-earmold scores. These findings suggest that the inclusion of the open earmold with a CROS aid in the audiologist’s armamentarium should increase his flexibility in selecting hearing aids for persons with a high frequency hearing loss.

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