Percentiles of normal hearing-threshold distribution under free-field listening conditions in numerical form

ISO 28961, which describes the statistical distribution of hearing thresholds of otologically normal young persons, was established in 2012. The thresholds are those for pure tones of frontal incidence under binaural listening conditions in a free field. Percentiles of the threshold distribution are calculable as a function of frequency from 20 Hz to 16,000 Hz. This international standard is based on the study results of the present authors, who estimated the form of individual distribution using threshold data in their experiments and those in literature adopted in ISO 226 and ISO 389-7. However, because the results were published separately in four journal papers, users of the standard may encounter difficulty in understanding the process of how the threshold data have been integrated and how the threshold distribution has been determined. Therefore, the authors summarize them in this review paper and present an outline of the threshold distribution estimation so that the standard will be understood correctly and used widely.

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“…5 as a function of frequency. [5] The SD curve in Fig. 5 has many peaks and valleys on the frequency axis.…”

Section: Integration Of Standard Deviations Of Threshold Distributionmentioning

confidence: 99%

“…Results of the research on which ISO 28961 is based have been published in four journal papers [4][5][6][7]. The threshold data that were used and the procedures for estimating the form of threshold distribution are described there.…”

Section: Introductionmentioning

confidence: 99%

How large is the individual difference in hearing sensitivity?: Establishment of ISO 28961 on the statistical distribution of hearing thresholds of otologically normal young persons

Kurakata

Mizunami

Matsushita

2013

Acoust. Sci. & Tech.

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“…This Short Note is intended to re-examine the hearingthreshold distribution reported in studies by Kurakata et al [1,3] and to show a more precise profile of our auditory sensitivity at high frequencies. First, skewness and kurtosis of the threshold distribution are again analyzed in Sect.…”

Section: Introductionmentioning

confidence: 98%

“…Then they calculated the standard deviation (SD) of hearing thresholds as a function of frequency from 31.5 Hz to 18 kHz, integrating measurement data of 10 studies. Using those SDs and the reference threshold values of the ISO standard [2], the authors presented a profile of the threshold distribution for nearly the entire range of audible frequencies in tabular and graphical forms [3].…”

Section: Introductionmentioning

confidence: 99%

Statistical distribution of normal hearing thresholds for high-frequency tones

Kurakata

Mizunami

2008

Acoust. Sci. & Tech.

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“…The statistical distribution of normal hearing thresholds for pure tones in the low-frequency (LF) region was estimated as a function of frequency, using a similar procedure to that used in an earlier work by the authors Kurakata et al, [3]. First, the distribution of individual LF thresholds was investigated using threshold measurement data.…”

Section: Introductionmentioning

confidence: 99%

The Statistical Distribution of Normal Hearing Thresholds for Low-Frequency Tones

Kurakata

Mizunami

2008

Journal of Low Frequency Noise, Vibration and Active Control

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The statistical distribution of normal hearing thresholds for pure tones in the low-frequency (LF) region was estimated as a function of frequency, using a similar procedure to that used in an earlier work by the authors Kurakata et al., [3]. First, the distribution of individual LF thresholds was investigated using threshold measurement data. Results indicated that the threshold variation among individuals can be approximated using a normal distribution. Second, under the assumption of normality, standard deviations (SDs) of hearing threshold distributions were calculated. For that calculation, the measurement data of different studies were integrated to enhance the estimation accuracy. Finally, using the obtained SDs, the threshold distribution around the average value was presented graphically. These results illustrate the profile of our auditory sensitivity at LFs more accurately and are useful for evaluating the audibility of LF noises because they incorporate individual differences.

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Percentiles of normal hearing-threshold distribution under free-field listening conditions in numerical form

Cited by 4 publications

References 3 publications

How large is the individual difference in hearing sensitivity?: Establishment of ISO 28961 on the statistical distribution of hearing thresholds of otologically normal young persons

How large is the individual difference in hearing sensitivity?: Establishment of ISO 28961 on the statistical distribution of hearing thresholds of otologically normal young persons

Statistical distribution of normal hearing thresholds for high-frequency tones

The Statistical Distribution of Normal Hearing Thresholds for Low-Frequency Tones

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