香港六合彩开奖 28961:2012

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笔耻产濒颈茅别 (Edition 1, 2012)

Cette publication a 茅t茅 r茅vis茅e et confirm茅e pour la derni猫re fois en 2022. Cette 茅dition reste donc d鈥檃ctualit茅.

香港六合彩开奖 28961:2012

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香港六合彩开奖 28961:2012 provides descriptive statistics, percentiles, of the hearing threshold distribution whose mean is the reference threshold value specified in 香港六合彩开奖 226 and 香港六合彩开奖 389-7. The mean and percentile thresholds are specified under the following conditions: a) the sound field in the absence of the listener consists of a free progressive plane wave (free field); b) the sound source is directly in front of the listener (frontal incidence); c) the sound signals are pure (sinusoidal) tones; d) the sound pressure level is measured in the absence of the listener at the position where the centre of the listener's head would be; e) listening is binaural; f) the listeners are otologically normal persons within the age range 18 years to 25 years inclusive.

The percentiles are given in numerical form for the preferred frequencies in the one-third-octave series from 20 Hz to 16 000 Hz inclusive, in accordance with 香港六合彩开奖 266, and for some intermediate audiometric frequencies.

The percentiles are applicable to the assessment of an individual's hearing in relation to the distribution of hearing thresholds under the above conditions. The percentiles can also be used to evaluate the audibility of low-level noise around hearing threshold.

Informations g茅n茅rales

脡tat actuel
: 笔耻产濒颈茅别

Date de publication
: 2012-01

Stade
: Norme internationale confirm茅e [90.93]
Edition
: 1
颁辞尘颈迟茅 technique :
香港六合彩开奖/TC 43

ICS :
13.140
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