AUDITORY SENSITIVITY OF THE GUINEA PIG TO LOW-FREQUENCY TONES

1959 ◽  
Vol 9 (7) ◽  
pp. 339 ◽  
Author(s):  
CARL E. SHERRICK
Keyword(s):  
Guinea Pig ◽  
Low Frequency ◽  
Auditory Sensitivity

Auditory Sensitivity of the Guinea Pig to Low-Frequency Tones

1959 ◽  
Vol 9 (3) ◽  
pp. 339-344 ◽  
Author(s):  
Carl E. Sherrick ◽  
Robert C. Bilger
Keyword(s):  
Guinea Pig ◽  
Low Frequency ◽  
Auditory Sensitivity

Low frequency electromagnetic radiation and hearing

2009 ◽  
Vol 123 (11) ◽  
pp. 1204-1211 ◽  
Author(s):  
J Morales ◽  
M Garcia ◽  
C Perez ◽  
J V Valverde ◽  
C Lopez-Sanchez ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Electromagnetic Fields ◽  
Control Animal ◽  
Guinea Pigs ◽  
Low Frequency ◽  
Organ Of Corti ◽  
Outer Hair Cells ◽  
Morphological Alteration ◽  
Electric Response ◽  
Hearing Level

AbstractObjective:To analyse the possible impact of low and extremely low frequency electromagnetic fields on the outer hairs cells of the organ of Corti, in a guinea pig model.Materials and methods:Electromagnetic fields of 50, 500, 1000, 2000, 4000 and 5000 Hz frequencies and 1.5 µT intensity were generated using a transverse electromagnetic wave guide. Guinea pigs of both sexes, weighing 100–150 g, were used, with no abnormalities on general and otic examination. Total exposure times were: 360 hours for 50, 500 and 1000 Hz; 3300 hours for 2000 Hz; 4820 hours for 4000 Hz; and 6420 hours for 5000 Hz. One control animal was used in each frequency group. The parameters measured by electric response audiometer included: hearing level; waves I–IV latencies; wave I–III interpeak latency; and percentage appearance of waves I–III at 90 and 50 dB sound pressure level intensity.Results:Values for the above parameters did not differ significantly, comparing the control animal and the rest of each group. In addition, no significant differences were found between our findings and those of previous studies of normal guinea pigs.Conclusion:Prolonged exposure to electromagnetic fields of 50 Hz to 5 KHz frequencies and 1.5 µT intensity, produced no functional or morphological alteration in the outer hair cells of the guinea pig organ of Corti.

Cutile Air and Bone Conduction Thresholds of the Deaf

1970 ◽  
Vol 36 (8) ◽  
pp. 571-579 ◽  
Author(s):  
E. Harris Nober
Keyword(s):  
High Intensity ◽  
Subcutaneous Injection ◽  
Bone Conduction ◽  
Low Frequency ◽  
Normal Hearing ◽  
Auditory Sensitivity ◽  
Deaf Children ◽  
Residual Hearing ◽  
Tactile Receptors

This article reports an exploration of whether low frequency air and bone thresholds elicited at high intensity levels from deaf children reflect valid auditory sensitivity or are mediated through cutaneous-tactile receptors. Twenty-one subjects comprised of 5 “priority deaf” subjects (totally deaf), 6 “control deaf” subjects (residual hearing) and 10 “normal” hearing were given a local subcutaneous injection of 2 percent xylocaine to eliminate local cutaneous-tactile interference. Results indicated the air thresholds extinguished during the anesthetic block only for priority deaf subjects with “cutile” (cutaneous-tactile) thresholds and not for the control deaf with residual hearing or for the normal hearing group. It was concluded that air and bone thresholds of many profoundly deaf children are not auditory but are mediated through cutaneous-tactile receptors.

Sign in / Sign up

Export Citation Format

Share Document