Wideband reflectance measurement of the contralateral acoustic reflex threshold for broadband noise and 1000‐Hz tones

2001 ◽  
Vol 109 (5) ◽  
pp. 2374-2374
Author(s):  
M. Patrick Feeney ◽  
Lindsay Marryott
Keyword(s):  
Broadband Noise ◽  
Acoustic Reflex ◽  
Reflectance Measurement ◽  
Reflex Threshold ◽  
Wideband Reflectance ◽  
Acoustic Reflex Threshold

Temporal Integration of the Contralateral Acoustic Reflex Threshold for a 1000 Hz Tonal Activator and Its Age-Related Changes

2009 ◽  
Vol 20 (04) ◽  
pp. 225-228 ◽  
Author(s):  
Michele B. Emmer ◽  
Shlomo Silman ◽  
Carol A. Silverman ◽  
Harry Levitt
Keyword(s):  
Temporal Integration ◽  
Age Effect ◽  
Broadband Noise ◽  
Hearing Level ◽  
Acoustic Reflex ◽  
Hearing Sensitivity ◽  
Age Related ◽  
Main Effect ◽  
Reflex Threshold ◽  
Acoustic Reflex Threshold

Background: Previous research has noted an age effect on the temporal integration of the acoustic reflex for a noise activator. Purpose: To determine whether the age effect earlier noted for a noise activator will be noted for a tonal activator. Research Design: Comparison of ARTs of younger and older groups at activating stimulus durations of 12, 25, 50, 100, 200, 300, 500, and 1000 msec. Study Sample: Two groups of adults with normal-hearing sensitivity: one group of 20 young adults (ten males and ten females, ages 18–29 years, with a mean age of 24 years) and one group of 20 older adults (ten males and ten females, ages 59–75 years, with a mean age of 67.5 years). Results: A significant main effect for duration was obtained. That is, as the duration increased, the acoustic reflex threshold for the 1000 Hz tonal activator decreased. The interactions of duration × age group and duration × hearing level were not significant. There was a nonsignificant main effect (p = .889) for the between-subjects factor of age. Conclusion: Results contradict the findings for broadband noise.

Measurement of the Electrically Evoked Stapedial Reflex Response with Wideband Acoustic Reflectance Measurement

2018 ◽  
Vol 29 (04) ◽  
pp. 337-347 ◽  
Author(s):  
Jace Wolfe ◽  
Rene Gifford ◽  
Erin Schafer
Keyword(s):  
Cochlear Implant ◽  
Reflex Response ◽  
Acoustic Reflex ◽  
Probe Tone ◽  
Reflectance Measurement ◽  
Repeated Measures Design ◽  
Electrode Contact ◽  
Stapedial Reflex ◽  
Reflex Threshold ◽  
Wideband Reflectance

AbstractThe electrically evoked stapedial reflex threshold (ESRT) has been shown to be a good predictor of upper stimulation level for cochlear implant recipients. Previous research has shown that the ESRT may be recorded at lower stimulation levels and with a higher incidence of success with the use of higher frequency probe tones (e.g., 678 and 1000 Hz) relative to the use of the conventional 226-Hz probe tone. Research has also shown that the acoustic reflex may be recorded at lower stimulus levels with the use of wideband reflectance when compared to the acoustic reflex threshold recorded with a conventional acoustic immittance measurement.The objective of this study was to compare the ESRT recorded with acoustic immittance and wideband reflectance measurements.A repeated measures design was used to evaluate potential differences in ESRTs with stimulation at an apical, middle, and basal electrode contact with the use of two different techniques, acoustic immittance measurement and wideband reflectance.Twelve users of Cochlear Nucleus cochlear implants were included in the study.Participants’ ESRTs were evaluated in response to simulation at three different electrode contact sites (i.e., an apical, middle, and basal electrode contact) with the use of two different middle ear measurement techniques, acoustic immittance with the use of a 226-Hz probe tone and wideband reflectance with the use of a chirp stimulus.The mean ESRT recorded with wideband reflectance measurement was significantly lower when compared to the ESRT recorded with acoustic immittance. For one participant, the ESRT was not recorded with acoustic immittance before reaching the participant’s loudness discomfort threshold, but it was successfully recorded with the use of wideband reflectanceThe ESRT may potentially be recorded at lower presentation levels with the use of wideband reflectance measures relative to the use of acoustic immittance with a 226-Hz probe tone. This may allow for the ESRT to be obtained at levels that are more comfortable for the cochlear implant recipient, which may also allow for a higher incidence in the successful recording of the ESRT.

Factors Influencing the Acoustic-Immittance Characteristics of the Acoustic Reflex

1979 ◽  
Vol 22 (3) ◽  
pp. 480-499 ◽  
Author(s):  
Richard H. Wilson
Keyword(s):  
Middle Ear ◽  
Sound Pressure ◽  
Broadband Noise ◽  
Intensity Level ◽  
Ear Canal ◽  
Acoustic Reflex ◽  
Impedance Characteristics ◽  
Reflex Threshold ◽  
Acoustic Reflex Threshold ◽  
Tonal Stimuli

Measurements of the aural acoustic-immittance (admittance and impedance) characteristics of the middle-ear transmission system in humans during the quiescent (static) and reflexive states were made (N = 36) utilizing a signal-averaging technique. Three pure tones (750, 1000, and 2000 Hz) and broadband noise stimuli elicited the acoustic reflex in 2-dB steps at sound-pressure levels from 84–116 dB (tones) and 66–116 dB (noise) during ascending- and descending-intensity level runs. The contralateral middle-ear activity was monitored with a 220-Hz probe by digitizing the conductance and susceptance outputs of an admittance meter. A computer corrected for the ear-canal volume utilizing measurements made at ear-canal pressures of 0 and −350 daPa and then converted the conductance and susceptance values into admittance and impedance units. The results were reported in absolute and relative immittance units, including components, as a function of both stimulus sound-pressure level and intensity level above the acoustic-reflex threshold. The static immittance of the middle ear changed nonlinearly over time to lower admittance or higher impedance values. The influence of this static-immittance shift on the reflex magnitude was discussed. The largest mean reflex magnitude and the slowest rate of growth were observed with broadband noise, although eight of the 36 subjects demonstrated the largest reflex magnitude in response to one or more of the tonal stimuli. Although static-immittance values and acoustic-reflex thresholds were poorly correlated, the reflex magnitudes were proportional to static immittance. The variability of the reflex measures was similar to the variability of the static-immittance values. Finally, bi-directional changes in resistance during the reflexive state were observed and discussed.

Effects of Alcohol on the Acoustic Reflex Threshold

2008 ◽  
Vol 4 (1) ◽  
pp. 48-51
Author(s):  
Mee-Hye Park ◽  
Hyun-Woo Kyun ◽  
Boo-Eem Kim
Keyword(s):  
Acoustic Reflex ◽  
Reflex Threshold ◽  
Acoustic Reflex Threshold

Some effects of signal bandwidth and spectral density on the acoustic‐reflex threshold in the elderly

1989 ◽  
Vol 86 (5) ◽  
pp. 1783-1789 ◽  
Author(s):  
John J. Jakimetz ◽  
Shlomo Silman ◽  
Maurice H. Miller ◽  
Carol Ann Silverman
Keyword(s):  
Spectral Density ◽  
The Elderly ◽  
Acoustic Reflex ◽  
Reflex Threshold ◽  
Acoustic Reflex Threshold

Auditory Brainstem Response and Audiologic Findings in Adrenoleukodystrophy: Its Variant and Carrier

1988 ◽  
Vol 98 (3) ◽  
pp. 215-220 ◽  
Author(s):  
Hiroshi Shimizu ◽  
Hugo W. Moser ◽  
Sakkubai Naidu
Keyword(s):  
High Sensitivity ◽  
Auditory Brainstem ◽  
Speech Discrimination ◽  
Acoustic Reflex ◽  
Auditory Brain Stem Response ◽  
Auditory Brain Stem ◽  
Profound Deafness ◽  
Brainstem Response ◽  
Reflex Threshold ◽  
Acoustic Reflex Threshold

Auditory brain stem response, auditory sensitivity, speech discrimination function, acoustic reflex threshold, and reflex decay were studied in seven children with adrenoleukodystrophy (ALD), nine adults with adrenomyeloneuropathy (AMN), one child with neonatal ALD, and two carriers of ALD. Significant auditory dysfunctions were found in only two patients; a retrocochlear type auditory disorder in one child with ALD, and a profound deafness in a child with neonatal ALD. None of the patients showed significant abnormality in acoustic reflex threshold and reflex decay except for one patient with ALD who showed a slightly elevated reflex threshold. All but two ALD patients showed significantly prolonged wave latencies and interwave intervals. The latency values revealed the highest incidence of abnormality in the I to III interval; this was followed by the III to V interval, then by wave I. Significantly, one child with asymptomatic ALD and both heterozygous female relatives showed abnormal ABRs, demonstrating the high sensitivity of ABR in detection of the existence of pathophysiological condition in subclinical or presymptomatic ALD.

The Prediction of Hearing Loss in Persons With Cerebral Palsy Using Contralateral Acoustic Reflex Threshold for Broad-Band Noise

2003 ◽  
Vol 12 (2) ◽  
pp. 91-95
Author(s):  
Michele B. Emmer ◽  
Shlomo Silman
Keyword(s):  
Hearing Loss ◽  
Cerebral Palsy ◽  
Broad Band ◽  
Screening Method ◽  
Accurate Method ◽  
Normal Hearing ◽  
Acoustic Reflex ◽  
Band Noise ◽  
Reflex Threshold ◽  
Acoustic Reflex Threshold

The utility of R. Keith’s (1977) method of screening for hearing sensitivity using the contralateral acoustic-reflex threshold (ART) for broad-band noise (BBN) was tested in persons with cerebral palsy (CP). Three groups of participants were included in this prospective study. The first group comprised 20 normal-hearing individuals without CP whose results were used as normative data. The second group comprised 16 participants with normal hearing and CP. The third group comprised 22 participants with sensorineural hearing loss and CP. The results of this study indicate that Keith’s screening method employing ART for BBN can be used successfully in a population with multiple handicaps where a quick, inexpensive, readily available, and accurate method is needed.

The Acoustic Reflex Threshold: Not Predictive for Loudness Perception in Normally-hearing Listeners

1999 ◽  
Vol 38 (6) ◽  
pp. 303-307 ◽  
Author(s):  
Steen Ø Olsen ◽  
Arne N. Rasmussen ◽  
Lars H. Nielsen ◽  
Britt V. Borgkvist
Keyword(s):  
Acoustic Reflex ◽  
Reflex Threshold ◽  
Acoustic Reflex Threshold

scholarly journals The effects of neural synchronization and peripheral compression on the acoustic-reflex threshold

2005 ◽  
Vol 117 (5) ◽  
pp. 3016-3027 ◽  
Author(s):  
Matthias Müller-Wehlau ◽  
Manfred Mauermann ◽  
Torsten Dau ◽  
Birger Kollmeier
Keyword(s):  
Acoustic Reflex ◽  
Neural Synchronization ◽  
Peripheral Compression ◽  
Reflex Threshold ◽  
Acoustic Reflex Threshold
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