A simple calculation approach for the second harmonic sound field generated by an arbitrary axial‐symmetric source

1996 ◽  
Vol 100 (2) ◽  
pp. 727-733 ◽  
Author(s):  
Desheng Ding ◽  
Yongan Shui ◽  
Jingbo Lin ◽  
De Zhang
Keyword(s):  
Second Harmonic ◽  
Sound Field ◽  
Simple Calculation ◽  
Symmetric Source

A Simple Calculation Approach for the Parametric Sound Field Generated by a Focused Annular Array: Application to Vibroacoustography

2006 ◽  
pp. 145-150 ◽  
Author(s):  
Jean-Pierre Remenieras ◽  
Olivier Bou Matar ◽  
Frédéric Ossant ◽  
Frédéric Patat
Keyword(s):  
Sound Field ◽  
Simple Calculation ◽  
Annular Array

Second harmonic component of a nonlinearly distorted wave in a focused sound field

1987 ◽  
Vol 82 (2) ◽  
pp. 621-628 ◽  
Author(s):  
Shigemi Saito ◽  
Bong Chae Kim ◽  
Thomas G. Muir
Keyword(s):  
Second Harmonic ◽  
Harmonic Component ◽  
Sound Field ◽  
Distorted Wave

scholarly journals Second harmonic component of nonlinearly distorted wave in a 20-MHz focused sound field.

1998 ◽  
Vol 19 (2) ◽  
pp. 133-139
Author(s):  
Shigemi Saito ◽  
Naoyuki Akashi ◽  
Jun'ichi Kushibiki
Keyword(s):  
Second Harmonic ◽  
Harmonic Component ◽  
Sound Field ◽  
Distorted 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.

Sign in / Sign up

Export Citation Format

Share Document