Audiometric Gelle Test with a New Transducer

1968 ◽  
Vol 11 (2) ◽  
pp. 411-427
Author(s):  
Charlene B. Stephens ◽  
Godfrey E. Arnold
Keyword(s):  
Pressure Transducer ◽  
Pressure Effect ◽  
Bone Conduction ◽  
Hearing Threshold ◽  
Uniform Pressure ◽  
Frequency Range ◽  
Test Norms ◽  
Negative Pressures ◽  
Occlusion Effect ◽  
Air Conduction

The audiometric Gelle Test was administered to 10 young adults with normal hearing. Threshold measurements were obtained by air and bone conduction using ±40 cm H 2 O pressure at 250, 500, 750, and 1000 Hz. Positive and negative pressures were varied in steps of 10 cm H 2 O up to 50 cm H 2 O over the frequency range of 100–1000 Hz. This was done to determine the amount of pressure that produced the greatest temporary threshold shift. Results suggested: (1) pressures of ±30 cm H 2 O are satisfactory and optimal for clinical practice; (2) contrary to previous reports, low tones were not found to be more affected than moderately higher frequencies; (3) maximum shift occurs from 250–1000 Hz and reveals a uniform pressure effect over this frequency range; (4) negative pressures are more effective than positive; (5) air conduction is more affected than is bone conduction; (6) bone conduction evaluation continues to be fraught with many difficulties, most prominent being the occlusion effect; (7) an improved pressure transducer has been accomplished; and (8) test norms for air and bone conduction have been established.

Normal Brief-Tone Bone-Conduction Behavioral Thresholds Using the B-71 Transducer: Three Occlusion Conditions

2003 ◽  
Vol 14 (10) ◽  
pp. 556-562 ◽  
Author(s):  
Susan A. Small ◽  
David R. Stapells
Keyword(s):  
Auditory Brainstem Response ◽  
Pure Tone ◽  
Bone Conduction ◽  
Auditory Brainstem ◽  
Behavioral Thresholds ◽  
Brainstem Response ◽  
Occlusion Effect ◽  
Response Testing ◽  
Brief Tones ◽  
Air Conduction

Behavioral thresholds were measured from 31 adults with normal hearing for 500, 1000, 2000, and 4000 Hz brief tones presented using a B-71 bone oscillator. Three occlusion conditions were assessed: ears unoccluded, one ear occluded, and both ears occluded. Mean threshold force levels were 67, 54, 49, and 41 dB re:1μN peak-to-peak equivalent in the unoccluded condition for 500, 1000, 2000, and 4000 Hz, respectively (corrected for air-conduction pure-tone thresholds). A significant occlusion effect was observed for 500 and 1000 Hz stimuli. These thresholds may be used as the 0 dB nHL (normalhearing level) for brief-tone bone-conduction stimuli for auditory brainstem response testing.

The Variability of Occluded and Unoccluded Bone-Conduction Thresholds

1967 ◽  
Vol 10 (2) ◽  
pp. 232-249 ◽  
Author(s):  
Donald Dirks ◽  
John G. Swindeman
Keyword(s):  
Young Adults ◽  
Bone Conduction ◽  
Normal Hearing ◽  
Previous Experience ◽  
Basic Design ◽  
Test Frequency ◽  
Final Experiment ◽  
Occlusion Effect ◽  
Air Conduction

A series of three experiments of similar basic design was performed on individuals with normal hearing to compare the variability associated with occluded and unoccluded bone-conduction thresholds. Estimates of threshold were obtained at each test frequency for air conduction, unoccluded bone conduction, and occluded bone conduction stimuli. Eleven young adults participated in Experiment I. Their ears were occluded by TDH-39 earphones encased in MX41/AR cushions. In Experiment II 11 young adults were tested with a Grason-Stadler 001 circumaural cushion replacing the MX41/AR cushion. Two types of occluders were compared in Experiment III, using nine subjects with previous experience in Bekesy tracing. The variability of the occluded bone-conduction thresholds was either similar or less than that observed during the unoccluded measurements. The variability of the occlusion effect itself was comparable or less than the variability of the unoccluded or occluded bone-conduction thresholds. The source of the variability stemmed largely from differences between individuals rather than from test-retest variability. Although the variability of the occluded thresholds was reduced slightly when the circumaural cushion was used as compared to the supra-aural cushion, the results of the final experiment did not completely support the earlier finding.

scholarly journals Extended high-frequency audiometry in healthy adults with different age groups

2021 ◽  
Vol 50 (1) ◽  
Author(s):  
Mingming Wang ◽  
Yu Ai ◽  
Yuechen Han ◽  
Zhaomin Fan ◽  
Peng Shi ◽  
...  
Keyword(s):  
High Frequency ◽  
Pure Tone ◽  
Bone Conduction ◽  
Hearing Threshold ◽  
Healthy Population ◽  
Age Group ◽  
Hearing Ability ◽  
Hearing Thresholds ◽  
High Frequency Audiometry ◽  
Air Conduction

Abstract Background It was well-documented that extended high-frequency (EHF, above 8 kHz) hearing test could be more sensitive comparing with the conventional measurement on frequency below 8 kHz, regarding the early prediction of auditory damage in certain population. However, hardly any age-specific thresholds of EHF in population with normal hearing ability were observed. This study aims to monitor the age-dependent hearing thresholds at EHF (from 9 to 20 kHz) in healthy hearing population. Methods A total of 162 healthy participants (from 21 to 70 years) with normal conventional pure tone audiograms were recruited and separated into five groups by age. Conventional pure tone average was performed with frequencies from 0.25 to 8 kHz under air conduction and from 0.25 to 4 kHz under bone conduction. EHF audiometry from 9 to 20 kHz was determined under air conduction. Results The effects of aging on hearing were evident at frequencies above 4 kHz. The hearing thresholds of EHF were less than 26 dB HL before 30 years-olds. Hearing abilities in EHF were deteriorated starting from the 31 ~ 40 group and were most obvious in the 51 ~ 60 group and the 61 ~ 70 group with the maximum thresholds of 75 dB HL. Sensitivity of EHF was inversely proportional to the frequency within each age group, and to age among groups. Subjects under 30 years old were totally responsive up to 16 kHz, and 52.2% could respond to 20 kHz. Meanwhile, no responsiveness was recorded to 20 kHz in the 51 ~ 60 group and even to 18 kHz in the 61 ~ 70 group. No gender differences in hearing threshold was observed within each age group, except an obvious decline at frequencies of 4, 6, 8, and 9 kHz in male participants of the 41 ~ 50 group. Conclusions Hearing thresholds at EHF from 9 to 20 kHz were more sensitive than at frequencies below 8 kHz for hearing measurement, and aging inversely affected hearing ability at EHF in healthy population. Hearing thresholds at EHF deteriorated with age and raising frequency, while the upper frequency limit decreased with aging. Graphical abstract

The Occlusion Effect in Unilateral Functional Hearing Loss

1970 ◽  
Vol 13 (1) ◽  
pp. 37-40
Author(s):  
Gary Thompson ◽  
Marie Denman
Keyword(s):  
Hearing Loss ◽  
Bone Conduction ◽  
Low Frequency ◽  
Clinical Implications ◽  
The Right ◽  
Occlusion Effect

Bone-conduction tests were administered to subjects who feigned a hearing loss in the right ear. The tests were conducted under two conditions: With and without occlusion of the non-test ear. It was anticipated that the occlusion effect, a well-known audiological principle, would operate to draw low frequency bone-conducted signals to the occluded side in a predictable manner. Results supported this expectation and are discussed in terms of their clinical implications.

High-Frequency Air-Conduction and Electric Bone-Conduction Audiometry: Age and Sex Variations

1991 ◽  
Vol 20 (3) ◽  
pp. 181-189 ◽  
Author(s):  
Heikki Löppönen ◽  
Martti Sorri ◽  
Risto Bloigu
Keyword(s):  
High Frequency ◽  
Bone Conduction ◽  
Air Conduction ◽  
Age And Sex

Mutual cancellation between tones presented by air conduction, by bone conduction and by non-osseous (soft tissue) bone conduction

2012 ◽  
Vol 283 (1-2) ◽  
pp. 180-184 ◽  
Author(s):  
Shai Chordekar ◽  
Leonid Kriksunov ◽  
Liat Kishon-Rabin ◽  
Cahtia Adelman ◽  
Haim Sohmer
Keyword(s):  
Soft Tissue ◽  
Bone Conduction ◽  
Air Conduction

scholarly journals Vibrational and Acoustical Characteristics of Ear Pinna Simulators That Differ in Hardness

2021 ◽  
Vol 11 (3) ◽  
pp. 327-334
Author(s):  
Ryota Shimokura ◽  
Tadashi Nishimura ◽  
Hiroshi Hosoi
Keyword(s):  
External Auditory Canal ◽  
Sound Pressure ◽  
Bone Conduction ◽  
Calibration Method ◽  
Vibration Acceleration ◽  
Spectral Peaks ◽  
Ear Cartilage ◽  
A Current ◽  
Air Conduction ◽  
Dominant Frequencies

Because cartilage conduction—the transmission of sound via the aural cartilage—has different auditory pathways from well-known air and bone conduction, how the output volume in the external auditory canal is stimulated remains unknown. To develop a simulator approximating the conduction of sound in ear cartilage, the vibrations of the pinna and sound in the external auditory canal were measured using pinna simulators made of silicon rubbers of different hardness (A40, A20, A10, A5, A0) as measured by a durometer. The same procedure, as well as a current calibration method for air conduction devices, was applied to an existing pinna simulator, the Head and Torso Simulator (hardness A5). The levels for vibration acceleration and sound pressure from these pinna simulators show spectral peaks at dominant frequencies (below 1.5 kHz) for the conduction of sound in cartilage. These peaks were likely to move to lower frequencies as hardness decreases. On approaching the hardness of actual aural cartilage (A10 to A20), the simulated levels for vibration acceleration and sound pressure approximated the measurements of human ears. The adjustment of the hardness used in pinna simulators is an important factor in simulating accurately the conduction of sound in cartilage.

scholarly journals Cutaneous and Labyrinthine Tolerance of Bioactive Glass S53P4 in Mastoid and Epitympanic Obliteration Surgery: Prospective Clinical Study

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Daniele Bernardeschi ◽  
Yann Nguyen ◽  
Francesca Yoshie Russo ◽  
Isabelle Mosnier ◽  
Evelyne Ferrary ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Inner Ear ◽  
Round Window ◽  
Bone Conduction ◽  
Hearing Threshold ◽  
Round Window Membrane ◽  
Prospective Clinical Study ◽  
Local Skin ◽  
Local Skin Reaction ◽  
Bone Conduction Hearing

Objective. To evaluate the cutaneous and the inner ear tolerance of bioactive glass S53P4 when used in the mastoid and epitympanic obliteration for chronic otitis surgery.Material and Methods. Forty-one cases have been included in this prospective study. Cutaneous tolerance was clinically evaluated 1 week, 1 month, and 3 months after surgery with a physical examination of the retroauricular and external auditory canal (EAC) skin and the presence of otalgia; the inner ear tolerance was assessed by bone-conduction hearing threshold 1 day after surgery and by the presence of vertigo or imbalance.Results. All surgeries but 1 were uneventful: all patients maintained the preoperative bone-conduction hearing threshold except for one case in which the round window membrane was opened during the dissection of the cholesteatoma in the hypotympanum and this led to a dead ear. No dizziness or vertigo was reported. Three months after surgery, healing was achieved in all cases with a healthy painless skin. No cases of revision surgery for removal of the granules occurred in this study.Conclusion. The bioactive glass S53P4 is a well-tolerated biomaterial for primary or revision chronic otitis surgery, as shown by the local skin reaction which lasted less than 3 months and by the absence of labyrinthine complications.

Sign in / Sign up

Export Citation Format

Share Document