The Relationship between the Change of Otoacoustic Emission and Temporary Threshold Shift after Broad Band Noise Stimulation / 대한이비인후과학회지
Korean Journal of Otolaryngology - Head and Neck Surgery
;
: 143-147, 2010.
Article
in Korean
| WPRIM
| ID: wpr-657165
ABSTRACT
BACKGROUND AND OBJECTIVES:
A distortion product otoacoustic emission (DPOAE) is a non-invasive method which is commonly used to assess the hearing function of the cochlea and to reflect objective information of specific frequency in the cochlea. We hypothesize that after applying a broad band noise (BBN), the outer hair cell's function will change and cause reduction in the amplitude of DPOAEs and signal to noise ratio (SNR). SUBJECTS ANDMETHOD:
We performed the examination on 40 subjects (80 ears) who have a normal hearing function. DPOAEs were recorded before and after BBN stimulation (intensity 90 dB HL, duration 10 minutes).RESULTS:
After the BBN stimulation, the amplitude of DPOAEs and SNR were decreased at all frequencies. The amplitude of DPOAEs and SNR decreased 0.3-1.6 dB SPL, 0.6-1.5 dB SPL, respectively. Decreases in the amplitude had statistical significances after 3 and 6 minutes in 1 kHz, 3 and 6 minutes in 2 kHz, immediately after noise exposure, and after 3 and 6 minutes in 6 kHz. However, the SNR changes had statistical significance only after 3 minutes in 1 kHz. After the stimulation, pure tone threshold at 4 kHz increased 3.2+/-3.9 dB HL. After the BBN exposure, the amplitude of DPOAEs and SNR decreased at all frequencies and most of them recovered within 12 minutes.CONCLUSION:
These results suggest that DPOAE could be a clinically useful method for the purpose of screening, managing and assessing the prognosis of acoustic trauma and noise induced sensorineural hearing loss.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Prognosis
/
Auditory Fatigue
/
Mass Screening
/
Cochlea
/
Signal-To-Noise Ratio
/
Hair
/
Hearing
/
Hearing Loss, Noise-Induced
/
Hearing Loss, Sensorineural
/
Noise
Type of study:
Prognostic study
/
Screening study
Language:
Korean
Journal:
Korean Journal of Otolaryngology - Head and Neck Surgery
Year:
2010
Type:
Article
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