Lateralizability and Detectability of a Low‐Frequency Tone as a Function of the Level of a Tonal Masker

1970 ◽  
Vol 47 (1A) ◽  
pp. 130-130
Author(s):  
William A. Yost ◽  
Donald E. Robinson
Keyword(s):  
Low Frequency ◽  
Frequency Tone

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

Ceiling Construction Low-Frequency Noise Issues

2013 ◽  
Vol 649 ◽  
pp. 277-280
Author(s):  
Petra Berková ◽  
Pavel Berka
Keyword(s):  
Spectral Analysis ◽  
Low Frequency ◽  
Sound Insulation ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Frequency Tone ◽  
The Impact ◽  
40 Hz

Through the use of a spectral analysis of the source of noise – person’s movement over the ceiling construction – it was found out that in this kind of noise distinctive low-frequency tone components occur (31,5 - 40 Hz) which is beyond the evaluation area of the impact sound insulation of the ceiling construction, s. [2], [3].

scholarly journals Cochlear compound action potentials from high-level tone bursts originate from wide cochlear regions that are offset toward the most sensitive cochlear region

2019 ◽  
Vol 121 (3) ◽  
pp. 1018-1033 ◽  
Author(s):  
C. Lee ◽  
J. J. Guinan ◽  
M. A. Rutherford ◽  
W. A. Kaf ◽  
K. M. Kennedy ◽  
...  
Keyword(s):  
High Frequency ◽  
Action Potentials ◽  
Tuning Curve ◽  
Low Frequency ◽  
Sound Level ◽  
Frequency Tone ◽  
Compound Action Potentials ◽  
High Level ◽  
Level Tone ◽  
Compound Action

Little is known about the spatial origins of auditory nerve (AN) compound action potentials (CAPs) evoked by moderate to intense sounds. We studied the spatial origins of AN CAPs evoked by 2- to 16-kHz tone bursts at several sound levels by slowly injecting kainic acid solution into the cochlear apex of anesthetized guinea pigs. As the solution flowed from apex to base, it sequentially reduced CAP responses from low- to high-frequency cochlear regions. The times at which CAPs were reduced, combined with the cochlear location traversed by the solution at that time, showed the cochlear origin of the removed CAP component. For low-level tone bursts, the CAP origin along the cochlea was centered at the characteristic frequency (CF). As sound level increased, the CAP center shifted basally for low-frequency tone bursts but apically for high-frequency tone bursts. The apical shift was surprising because it is opposite the shift expected from AN tuning curve and basilar membrane motion asymmetries. For almost all high-level tone bursts, CAP spatial origins extended over 2 octaves along the cochlea. Surprisingly, CAPs evoked by high-level low-frequency (including 2 kHz) tone bursts showed little CAP contribution from CF regions ≤ 2 kHz. Our results can be mostly explained by spectral splatter from the tone-burst rise times, excitation in AN tuning-curve “tails,” and asynchronous AN responses to high-level energy ≤ 2 kHz. This is the first time CAP origins have been identified by a spatially specific technique. Our results show the need for revising the interpretation of the cochlear origins of high-level CAPs-ABR wave 1. NEW & NOTEWORTHY Cochlear compound action potentials (CAPs) and auditory brain stem responses (ABRs) are routinely used in laboratories and clinics. They are typically interpreted as arising from the cochlear region tuned to the stimulus frequency. However, as sound level is increased, the cochlear origins of CAPs from tone bursts of all frequencies become very wide and their centers shift toward the most sensitive cochlear region. The standard interpretation of CAPs and ABRs from moderate to intense stimuli needs revision.

Rate encoding of binaurally alternating low‐frequency tone bursts in macaque A1

1997 ◽  
Vol 101 (5) ◽  
pp. 3123-3123
Author(s):  
David H. Reser ◽  
Yonatan I. Fishman ◽  
Joseph C. Arezzo ◽  
Mitchell Steinschneider
Keyword(s):  
Low Frequency ◽  
Frequency Tone

scholarly journals Optimizing smoke alarm signals: Testing the effectiveness of children’s smoke alarms for sleeping adults

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Gary A. Smith ◽  
Sandhya Kistamgari ◽  
Mark Splaingard
Keyword(s):  
Median Time ◽  
High Frequency ◽  
Low Frequency ◽  
The Other ◽  
Wilcoxon Test ◽  
Smoke Alarm ◽  
Smoke Alarms ◽  
Alarm Signals ◽  
Frequency Tone ◽  
Residential Fire

Abstract Background Being asleep is an important risk factor for death during a residential fire; however, the high-frequency tone smoke alarms in many homes will not adequately awaken children who are old enough to self-rescue. In a series of previous studies, we identified smoke alarm signals that effectively awaken children 5–12 years old and prompt their escape. Because it is impractical to have separate alarms for children and adults in a household, the purpose of this study is to test whether alarms that are effective in awakening children and prompting their escape are also effective among adults. Methods Using a randomized, non-blinded, repeated measures design, 150 adults 20–49 years old were exposed during stage 4 sleep to four different smoke alarms. Statistical tests included the Kaplan-Meier estimator, generalized Wilcoxon test, and hazard ratios with Wald’s 95% confidence intervals. Results The median age of study subjects was 30.0 years and 67.3% were female. Almost all (n = 149) subjects awakened and performed the escape procedure to all four alarms; one individual did not awaken or escape to the high-frequency tone alarm. The median time-to-awaken was 2.0 s for the high-frequency tone alarm and 1.0 s for the other three alarms. The median time-to-escape for the high-frequency tone alarm was 12.0 s, compared with 10.0 s for the low-frequency tone alarm and 9.0 s each for the female and male voice alarms. All pairwise comparisons between the high-frequency tone alarm and each of the other three alarms were statistically significant for the probability functions for time-to-awaken and time-to-escape. There were no significant differences in these outcome measures between the latter three alarms, except for female voice versus low-frequency tone alarms for time-to-escape. Conclusions All alarms performed well, demonstrating that smoke alarms developed for the unique developmental requirements of sleeping children are also effective among sleeping adults. Compared with a high-frequency tone alarm, use of these alarms may reduce residential fire-related injuries and deaths among children, while also successfully alerting adult members of the household.

Measures Against Ventilation Noise – which tone frequencies are least and most annoying?

1994 ◽  
Vol 13 (3) ◽  
pp. 81-88 ◽  
Author(s):  
Ulf Landström ◽  
Anders Kjellberg ◽  
Lena SÖDerberg ◽  
Bertil Nordström
Keyword(s):  
Low Frequency ◽  
Tone Frequency ◽  
Lower Performance ◽  
Frequency Tone ◽  
Lower Tone

20 subjects were exposed to a tonal ventilaton noise, with the information to adjust the tone frequency at 40 dBA, to the lowest and highest annoying experiences. The adjusted frequencies were 58 and 380 Hz. The higher frequency was correlated to significant higher annoyance, discomfort and lower performance. The rated effort was higher but below the significant level of 5%. According to the investigation, lower tone frequencies are less annoying than higher. The dBA ratings thus may result in an overestimation of the annoying reactions in cases of low frequency tone components.

Perceived Duration as a Function of Pitch

1988 ◽  
Vol 67 (1) ◽  
pp. 301-302 ◽  
Author(s):  
Willard L. Brigner
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
Frequency Tone ◽  
Actual Duration ◽  
Perceived Duration

It was demonstrated with 7 observers that the duration of a high frequency tone was perceived to be longer than the duration of a low frequency tone, even though the actual duration of the two tones was equal.

scholarly journals Analysis of the cochlear microphonic to a low-frequency tone embedded in filtered noise

2012 ◽  
Vol 132 (5) ◽  
pp. 3351-3362 ◽  
Author(s):  
Mark E. Chertoff ◽  
Brian R. Earl ◽  
Francisco J. Diaz ◽  
Janna L. Sorensen
Keyword(s):  
Low Frequency ◽  
Cochlear Microphonic ◽  
Frequency Tone ◽  
Filtered Noise
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