Effects of a neoprene wetsuit hood on low‐frequency underwater hearing thresholds

1999 ◽  
Vol 105 (2) ◽  
pp. 1298-1298 ◽  
Author(s):  
John R. Sims ◽  
David M. Fothergill ◽  
Michael D. Curley
Keyword(s):  
Low Frequency ◽  
Hearing Thresholds ◽  
Underwater Hearing

scholarly journals Treatment Outcomes of Patients with Glomus Tympanicum Tumors Presenting with Pulsatile Tinnitus

2021 ◽  
Vol 10 (11) ◽  
pp. 2348
Author(s):  
Seung-Jae Lee ◽  
Sang-Yeon Lee ◽  
Gwang-Seok An ◽  
Kyogu Lee ◽  
Byung-Yoon Choi ◽  
...  
Keyword(s):  
Treatment Outcomes ◽  
Low Frequency ◽  
Temporal Analysis ◽  
Endovascular Embolization ◽  
Preoperative Embolization ◽  
Surgical Removal ◽  
Pulsatile Tinnitus ◽  
Post Intervention ◽  
Hearing Thresholds ◽  
Glomus Tympanicum

We reviewed the clinical characteristics and treatment outcomes of patients with glomus tympanicum tumors (GTTs) presenting with pulsatile tinnitus (PT). We explored whether transcanal sound recording-spectro-temporal analysis (TSR-STA) usefully evaluated changes in PT. The medical records of 13 patients who underwent surgical removal of GTTs were reviewed retrospectively. Two patients underwent preoperative endovascular embolization. Changes in PT, pre- and postoperative audiometry data, TSR-STA results, and clinical outcomes were evaluated. PT was the chief complaint in eight patients (61.5%) and resolved immediately after surgical intervention in all. Two patients exhibited ipsilateral, pseudo-low-frequency hearing loss (PLFHL); surgical GTT removal elicited postoperative improvements in the ipsilesional low-frequency hearing thresholds. Five patients underwent TSR-STA using previously described methods. TSR-STA revealed definite rise-and-fall patterns; surgical tumor removal abated this pattern in one patient, but, for the other four, the patterns did not change greatly post-intervention. Thus, GTT-related PT can be treated successfully (via surgical GTT removal) without complications. In selected cases, preoperative embolization reduces intraoperative hemorrhage. In PT patients with PLFHL, a detailed otoendoscopic examination of the middle ear is required to rule out a GTT. TSR-STA may usefully (and objectively) assess postoperative improvements in GTT-related PT.

Underwater Hearing in the Frog, Rana Catesbeiana

1981 ◽  
Vol 91 (1) ◽  
pp. 57-71 ◽  
Author(s):  
R. ERIC LOMBARD ◽  
RICHARD R. FAY ◽  
YEHUDAH L. WERNER
Keyword(s):  
Sound Pressure ◽  
Rana Catesbeiana ◽  
Sound Intensity ◽  
Torus Semicircularis ◽  
Intensity Level ◽  
Hearing Thresholds ◽  
Average Loss ◽  
Two Measures ◽  
Underwater Hearing ◽  
Hearing Abilities

Comparable auditory sound pressure level (SPL) and sound intensity level(SIL) threshold curves were determined in air and under water in Ranacatesbeiana. Threshold curves were determined using chronic metal electrodeimplants which detected multi-unit responses of the torus semicircularis toincident sound. In terms of SPL, hearing thresholds in water and air aresimilar below 0.2 kHz. Above 0.2 kHz, the sensitivity under water falls of fat about 16 dB/octave to reach an average loss of about 30 dB above 0.4 kHz. In terms of SIL, the organism is about 30 dB more sensitive under water than in air below 0.2 kHz and equally sensitive in air and water above 0.4 kHz.The relative merits of the two measures are discussed and an attempt is made to relate the results to morphology of the middle and inner ears. This report is the first to compare aerial and underwater hearing abilities in any organism using electrode implants.

Low‐frequency underwater hearing sensitivity in belugas, Delphinapterus leucas

1988 ◽  
Vol 84 (6) ◽  
pp. 2273-2275 ◽  
Author(s):  
Frank T. Awbrey ◽  
Jeanette A. Thomas ◽  
Ronald A. Kastelein
Keyword(s):  
Low Frequency ◽  
Delphinapterus Leucas ◽  
Hearing Sensitivity ◽  
Underwater Hearing

Bimodal Benefits Revealed by Categorical Perception of Lexical Tones in Mandarin-Speaking Kindergarteners With a Cochlear Implant and a Contralateral Hearing Aid

2020 ◽  
Vol 63 (12) ◽  
pp. 4238-4251
Author(s):  
Hao Zhang ◽  
Jing Zhang ◽  
Gang Peng ◽  
Hongwei Ding ◽  
Yang Zhang
Keyword(s):  
Categorical Perception ◽  
Hearing Aid ◽  
Low Frequency ◽  
Lexical Tone ◽  
Linear Mixed Effects ◽  
Lexical Tones ◽  
Speech Stimuli ◽  
Direct Benefits ◽  
Hearing Thresholds ◽  
Mandarin Tone

Purpose Pitch reception poses challenges for individuals with cochlear implants (CIs), and adding a hearing aid (HA) in the nonimplanted ear is potentially beneficial. The current study used fine-scale synthetic speech stimuli to investigate the bimodal benefit for lexical tone categorization in Mandarin-speaking kindergarteners using a CI and an HA in opposite ears. Method The data were collected from 16 participants who were required to complete two classical tasks for speech categorical perception (CP) with CI + HA device condition and CI alone condition. Linear mixed-effects models were constructed to evaluate the identification and discrimination scores across different device conditions. Results The bimodal kindergarteners showed CP for the continuum varying from Mandarin Tone 1 and Tone 2. Moreover, the additional acoustic information from the contralateral HA contributes to improved lexical tone categorization, with a steeper slope, a higher discrimination score of between-category stimuli pair, and an improved peakedness score (i.e., an increased benefit magnitude for discriminations of between-category over within-category pairs) for the CI + HA condition than the CI alone condition. The bimodal kindergarteners with better residual hearing thresholds at 250 Hz level in the nonimplanted ear could perceive lexical tones more categorically. Conclusion The enhanced CP results with bimodal listening provide clear evidence for the clinical practice to fit a contralateral HA in the nonimplanted ear in kindergarteners with unilateral CIs with direct benefits from the low-frequency acoustic hearing.

scholarly journals Segmental and Suprasegmental Perception in Children Using Hearing Aids

2017 ◽  
Vol 28 (10) ◽  
pp. 901-912 ◽  
Author(s):  
Kaitlyn A. Wenrich ◽  
Lisa S. Davidson ◽  
Rosalie M. Uchanski
Keyword(s):  
Speech Perception ◽  
Outcome Measures ◽  
Hearing Aids ◽  
Low Frequency ◽  
Receptive Language ◽  
Acoustic Properties ◽  
Frequency Resolution ◽  
Residual Hearing ◽  
Hearing Thresholds ◽  
Hearing Device

Background: Suprasegmental perception (perception of stress, intonation, “how something is said” and “who says it”) and segmental speech perception (perception of individual phonemes or perception of “what is said”) are perceptual abilities that provide the foundation for the development of spoken language and effective communication. While there are numerous studies examining segmental perception in children with hearing aids (HAs), there are far fewer studies examining suprasegmental perception, especially for children with greater degrees of residual hearing. Examining the relation between acoustic hearing thresholds, and both segmental and suprasegmental perception for children with HAs, may ultimately enable better device recommendations (bilateral HAs, bimodal devices [one CI and one HA in opposite ears], bilateral CIs) for a particular degree of residual hearing. Examining both types of speech perception is important because segmental and suprasegmental cues are affected differentially by the type of hearing device(s) used (i.e., cochlear implant [CI] and/or HA). Additionally, suprathreshold measures, such as frequency resolution ability, may partially predict benefit from amplification and may assist audiologists in making hearing device recommendations. Purpose: The purpose of this study is to explore the relationship between audibility (via hearing thresholds and speech intelligibility indices), and segmental and suprasegmental speech perception for children with HAs. A secondary goal is to explore the relationships among frequency resolution ability (via spectral modulation detection [SMD] measures), segmental and suprasegmental speech perception, and receptive language in these same children. Research Design: A prospective cross-sectional design. Study Sample: Twenty-three children, ages 4 yr 11 mo to 11 yr 11 mo, participated in the study. Participants were recruited from pediatric clinic populations, oral schools for the deaf, and mainstream schools. Data Collection and Analysis: Audiological history and hearing device information were collected from participants and their families. Segmental and suprasegmental speech perception, SMD, and receptive vocabulary skills were assessed. Correlations were calculated to examine the significance (p < 0.05) of relations between audibility and outcome measures. Results: Measures of audibility and segmental speech perception are not significantly correlated, while low-frequency pure-tone average (unaided) is significantly correlated with suprasegmental speech perception. SMD is significantly correlated with all measures (measures of audibility, segmental and suprasegmental perception and vocabulary). Lastly, although age is not significantly correlated with measures of audibility, it is significantly correlated with all other outcome measures. Conclusions: The absence of a significant correlation between audibility and segmental speech perception might be attributed to overall audibility being maximized through well-fit HAs. The significant correlation between low-frequency unaided audibility and suprasegmental measures is likely due to the strong, predominantly low-frequency nature of suprasegmental acoustic properties. Frequency resolution ability, via SMD performance, is significantly correlated with all outcomes and requires further investigation; its significant correlation with vocabulary suggests that linguistic ability may be partially related to frequency resolution ability. Last, all of the outcome measures are significantly correlated with age, suggestive of developmental effects.

scholarly journals Hearing Thresholds for Low-Frequency Complex Tones of Less Than 150 Hz

2011 ◽  
Vol 30 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Jongkwan Ryu ◽  
Hiroshi Sato ◽  
Kenji Kurakata ◽  
Yukio Inukai
Keyword(s):  
Low Frequency ◽  
Hearing Thresholds ◽  
Complex Tones

Hearing Loss after Spinal Anesthesia: The Effect of Different Infusion Solutions

2007 ◽  
Vol 137 (1) ◽  
pp. 79-82 ◽  
Author(s):  
Tulay Sahin Yildiz ◽  
Mine Solak ◽  
Mete Iseri ◽  
Burhan Karaca ◽  
Kamil Toker
Keyword(s):  
Hearing Loss ◽  
Inner Ear ◽  
Spinal Anesthesia ◽  
Low Frequency ◽  
Volume Replacement ◽  
Frequency Range ◽  
Hearing Thresholds ◽  
Significant Difference ◽  
Single Blind ◽  
Blind Fashion

OBJECTIVE: We speculate that the preoperative volume replacement with a convenient solution may protect the inner ear function after spinal anesthesia. METHODS: The patients were randomized in a single-blind fashion into two groups: group LR (n = 40) received lactated Ringer's and group GF (n = 40) received gelatin polysuccinate 4% (Gelofusine). Spinal anesthesia was performed with a 25 G Quincke needle and was given bupivacaine 0.5% 10 mg and fentanyl 25 jxg. Audio-grams were performed preoperatively and 2 days postoperatively. RESULTS: The overall incidence of hearing loss was 7.5%. The hearing loss was unilateral in two and bilateral in four patients. Hearing loss occurred within the low-frequency range and the hearing thresholds returned to normal by the fifth postoperative day. CONCLUSIONS: Although the incidence of hearing loss for the lactated Ringer's group was higher than the Gelofusine group, there was no statistically significant difference between the groups. For medicolegal and ethical reasons, patients should be informed about the possibility of hearing loss after spinal anesthesia.

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