Development of Low-Frequency Tone Burst versus the Click Auditory Brainstem Response

2005 ◽  
Vol 16 (02) ◽  
pp. 114-121 ◽  
Author(s):  
Raymond M. Hurley ◽  
Annette Hurley ◽  
Charles I. Berlin
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
Tone Burst ◽  
Auditory Brainstem ◽  
Similar Data ◽  
Frequency Sensitivity ◽  
Frequency Tone ◽  
Brainstem Response ◽  
Threshold Testing ◽  
Wave Latency

Often ABR threshold testing employs clicks to assess high-frequency hearing, and low-frequency tone bursts to assess low-frequency sensitivity. While a maturation effect has been shown for click stimuli, similar data are lacking for low-frequency toneburst stimuli. Thus, 305 infants ranging in conceptional age (CA) from 33 weeks to 74 weeks were tested. Absolute latencies were measured for wave V at 55, 35, and 25 dB nHL in response to a click and for wave V500 in response to a 500 Hz tone burst. Major wave latency in response to 500 Hz tone bursts decreases with age and do not stabilize by 70 weeks CA. Likewise, waves III and V latencies in response to clicks decrease with age, as has been reported by others, and do not stabilize by 70 weeks CA. Wave I latency produced by clicks did not decrease with age, being mature by 33 weeks CA.

40-Hz Sinusoidal Auditory Steady-State Response and Tone Burst Auditory Brainstem Response Using a Kalman Filter to Determine Thresholds Pre- and Post-Myringotomy With Grommet Tube in Children With Mild, Low-Frequency Conductive Hearing Loss

2016 ◽  
Vol 25 (1) ◽  
pp. 41-53 ◽  
Author(s):  
Wafaa A. Kaf ◽  
Enass S. Mohamed ◽  
Hamza Elshafiey
Keyword(s):  
Hearing Loss ◽  
Otitis Media With Effusion ◽  
Low Frequency ◽  
Tone Burst ◽  
Auditory Brainstem ◽  
State Response ◽  
Behavioral Thresholds ◽  
Auditory Steady State Response ◽  
Brainstem Response ◽  
40 Hz

PurposeAccurate estimation of mild, low-frequency hearing loss is difficult in young children. This study aimed to determine the accuracy of 40-Hz sinusoidal auditory steady-state response (sASSR) compared with tone burst auditory brainstem response (TB-ABR) to detect mild, low-frequency hearing loss in children with otitis media with effusion and to measure postoperative thresholds.MethodsThresholds at 500 and 4000 Hz were measured behaviorally and electrophysiologically using TB-ABR and 40-Hz sASSR with a Kalman filter in 26 children with otitis media with effusion. Recording was conducted preoperatively and postoperatively while children were actively awake. Repeated measures mixed analyses of variance were conducted to determine effects among measures and the two test frequencies.ResultsBoth 40-Hz sASSR and TB-ABR accurately detected preoperative and postoperative thresholds and were within 5–10 dB of the behavioral thresholds at 4000 Hz. At 500 Hz, the mean 40-Hz sASSR threshold was only 5 dB above the behavioral thresholds and 18 dB better than the 500-Hz ABR threshold. Positive correlations were found but not between 40-sASSR and TB-ABR at 500 Hz. Also, the interrater judgment of the response was better for sASSR (89%) than TB-ABR (83%).ConclusionThe 40-Hz sASSR is more accurate than TB-ABR in determining a mild, low-frequency threshold.

scholarly journals Primate communication in the pure ultrasound

2012 ◽  
Vol 8 (4) ◽  
pp. 508-511 ◽  
Author(s):  
Marissa A. Ramsier ◽  
Andrew J. Cunningham ◽  
Gillian L. Moritz ◽  
James J. Finneran ◽  
Cathy V. Williams ◽  
...  
Keyword(s):  
High Frequency ◽  
Background Noise ◽  
Low Frequency ◽  
Auditory Brainstem ◽  
Dominant Frequency ◽  
Ultrasonic Vocalizations ◽  
Energetic Efficiency ◽  
Frequency Limit ◽  
Vocal Signals ◽  
Brainstem Response

Few mammals—cetaceans, domestic cats and select bats and rodents—can send and receive vocal signals contained within the ultrasonic domain, or pure ultrasound (greater than 20 kHz). Here, we use the auditory brainstem response (ABR) method to demonstrate that a species of nocturnal primate, the Philippine tarsier ( Tarsius syrichta ), has a high-frequency limit of auditory sensitivity of ca 91 kHz. We also recorded a vocalization with a dominant frequency of 70 kHz. Such values are among the highest recorded for any terrestrial mammal, and a relatively extreme example of ultrasonic communication. For Philippine tarsiers, ultrasonic vocalizations might represent a private channel of communication that subverts detection by predators, prey and competitors, enhances energetic efficiency, or improves detection against low-frequency background noise.

Effects of Stimulus Phase on the Normal Auditory Brainstem Response

1992 ◽  
Vol 35 (1) ◽  
pp. 167-174 ◽  
Author(s):  
Cynthia G. Fowler
Keyword(s):  
Auditory Brainstem Response ◽  
High Frequency ◽  
Stimulus Frequency ◽  
Low Frequency ◽  
Auditory Brainstem ◽  
Difference Potentials ◽  
Frequency Responses ◽  
Brainstem Response ◽  
The Difference ◽  
Two Phases

The purpose of this investigation was to determine the effects of stimulus phase on the latencies and morphology of the auditory brainstem response (ABR) of normal-hearing subjects. Although click stimuli produced equivalent ABR latencies for the rarefaction and condensation phases, the subtraction of the waveforms from the two phases yielded a difference potential. Tone pip stimuli produced polarity differences that were inversely related to stimulus frequency: the higher the frequency, the smaller the ABR latency differences between responses to rarefaction and condensation stimuli, and the smaller the difference potentials. Thus, whereas the latency of click-evoked ABR is dominated by high-frequency responses with equivalent latencies regardless of stimulus phase, low-frequency responses contribute to the overall morphology of the ABR that yields the phasic difference potential. The implications of these findings are discussed with reference to subjects with high-frequency hearing losses.

Glutathione Ester But Not Glutathione Protects Against Cisplatin-Induced Ototoxicity in a Rat Model

2003 ◽  
Vol 14 (03) ◽  
pp. 124-133 ◽  
Author(s):  
Kathleen C.M. Campbell ◽  
Deb L. Larsen ◽  
Robert P. Meech ◽  
Leonard P. Rybak ◽  
Larry F. Hughes
Keyword(s):  
Auditory Brainstem Response ◽  
Outer Hair Cell ◽  
Tone Burst ◽  
Auditory Brainstem ◽  
Control Group ◽  
Brainstem Response ◽  
Group A ◽  
Direct Administration ◽  
Response Thresholds ◽  
Para Determinar

Glutathione (GSH) provides an important antioxidant and detoxification pathway. We tested to determine if direct administration of GSH or GSH ester could reduce cisplatin- (CDDP) induced ototoxicity. We tested eight groups of five rats each: a control group, a group receiving 16 mg/kg ip CDDP infused over 30 minutes, and six groups receiving either GSH or GSH ester at 500, 1000, or 1500 mg/kg intraperitoneally 30 minutes prior to 16 mg/kg CDDP. Auditory brainstem response thresholds were measured for click and tone-burst stimuli at baseline and 3 days later. Outer hair cell (OHC) loss was measured for the apical, middle and basal turns. The 500 mg/kg GSH ester reduced hearing loss and OHC loss, but protection decreased as dosage increased, suggesting possible toxicity. GSH was not significantly protective. The best GSH ester protection was less than we have previously reported with D-methionine. El glutatión (GSH) brinda una importante vía antioxidante y de cetoxificación. Realizamos una prueba para determinar si la administración directa de GSH o del éster de GSH podía reducir la ototoxicidad inducida por cisplatino (CDDP). Hicimos una evaluación en ocho grupos de cinco ratas cada uno: un grupo control, un grupo que recibió CDDP intraperitoneal a 16 mg/kg en una ínfusión durante 30 minutos y seis grupos que recibieron intraperitonealmente GSH o el éster de GSH a 500, 1000 o 1500 mg/kg, 30 minutos antes del CDDP a 16 mg/kg. Se midieron umbrales de respuestas auditivas del tallo cerebral tanto para clicks como para bursts tonales, al inicio y 3 días después. La pérdida de células ciliadas externas (OHC) fue establecida a nivel de las vueltas apical, media y basal. La dosis de 500 mg/kg de éster de GSH redujo la hipoacusia y la pérdida de OHC, pero la protección disminuyó conforme la dosis se incrementó, sugiriendo una posible toxicidad. EL GSH no resultó significativamente protector. El mejor efecto protector del éster de GSH fue menor que el previamente reportado con D-Metionina.

scholarly journals Earless toads sense low frequencies but miss the high notes

2017 ◽  
Vol 284 (1864) ◽  
pp. 20171670 ◽  
Author(s):  
Molly C. Womack ◽  
Jakob Christensen-Dalsgaard ◽  
Luis A. Coloma ◽  
Juan C. Chaparro ◽  
Kim L. Hoke
Keyword(s):  
High Frequency ◽  
Species Differences ◽  
Low Frequency ◽  
Auditory Brainstem ◽  
Low Frequencies ◽  
Hearing Sensitivity ◽  
Sensory Pathways ◽  
Airborne Sound ◽  
Vibrational Sensitivity ◽  
Species Specific

Sensory losses or reductions are frequently attributed to relaxed selection. However, anuran species have lost tympanic middle ears many times, despite anurans' use of acoustic communication and the benefit of middle ears for hearing airborne sound. Here we determine whether pre-existing alternative sensory pathways enable anurans lacking tympanic middle ears (termed earless anurans) to hear airborne sound as well as eared species or to better sense vibrations in the environment. We used auditory brainstem recordings to compare hearing and vibrational sensitivity among 10 species (six eared, four earless) within the Neotropical true toad family (Bufonidae). We found that species lacking middle ears are less sensitive to high-frequency sounds, however, low-frequency hearing and vibrational sensitivity are equivalent between eared and earless species. Furthermore, extratympanic hearing sensitivity varies among earless species, highlighting potential species differences in extratympanic hearing mechanisms. We argue that ancestral bufonids may have sufficient extratympanic hearing and vibrational sensitivity such that earless lineages tolerated the loss of high frequency hearing sensitivity by adopting species-specific behavioural strategies to detect conspecifics, predators and prey.

scholarly journals Auditory Brainstem Responses to Successive Sounds: Effects of Gap Duration and Depth

2021 ◽  
Vol 11 (1) ◽  
pp. 38-46
Author(s):  
Fan-Yin Cheng ◽  
Craig A. Champlin
Keyword(s):  
Background Noise ◽  
Tone Burst ◽  
Auditory Brainstem ◽  
Auditory Brainstem Responses ◽  
Physical Parameters ◽  
Temporal Acuity ◽  
Harmonic Complex ◽  
Rapid Changes ◽  
Brainstem Response ◽  
Physiological Correlate

Temporal acuity is the ability to differentiate between sounds based on fluctuations in the waveform envelope. The proximity of successive sounds and background noise diminishes the ability to track rapid changes between consecutive sounds. We determined whether a physiological correlate of temporal acuity is also affected by these factors. We recorded the auditory brainstem response (ABR) from human listeners using a harmonic complex (S1) followed by a brief tone burst (S2) with the latter serving as the evoking signal. The duration and depth of the silent gap between S1 and S2 were manipulated, and the peak latency and amplitude of wave V were measured. The latency of the responses decreased significantly as the duration or depth of the gap increased. The amplitude of the responses was not affected by the duration or depth of the gap. These findings suggest that changing the physical parameters of the gap affects the auditory system’s ability to encode successive sounds.

Auditory Brainstem Responses to Middle- and Low-Frequency Tone Pips

1984 ◽  
Vol 23 (1) ◽  
pp. 75-84 ◽  
Author(s):  
M. Maurizi ◽  
G. Paludetti ◽  
F. Ottaviani ◽  
M. Rosignoli
Keyword(s):  
Low Frequency ◽  
Auditory Brainstem ◽  
Auditory Brainstem Responses ◽  
Frequency Tone
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