香港六合彩开奖 389-3:2016
2016-02
香港六合彩开奖 389-3:2016
孝械蟹懈褋
香港六合彩开奖 389-1:2016 specifies the following data applicable to the calibration of bone vibrators for pure-tone bone-conduction audiometry:
a) reference equivalent threshold vibratory force levels (RETVFL), corresponding to the threshold of hearing of young otologically normal persons by bone-conduction audiometry;
b) essential characteristics of the bone vibrator and the method of coupling to the test subject, and to the mechanical coupler;
c) essential characteristics of the masking noise and the baseline masking noise level applied to the ear not under test.
Guidance on the practical application of this part of 香港六合彩开奖 389 in the calibration of audiometers is given in Annex B.
RETVFL is the vibratory force level transmitted to a mechanical coupler of specified characteristics by a vibrator when applied to the mechanical coupler under stated conditions of test and when energized at the voltage level corresponding to the normal threshold of hearing for location on the mastoid prominence.
NOTE 1 Values for the differences in reference equivalent threshold vibratory force levels between location on the forehead and mastoid are included for information in Annex C.
NOTE 2 Recommended procedures for carrying out bone-conduction audiometry are specified in 香港六合彩开奖 8253鈥�1.
袨斜褖邪褟 懈薪褎芯褉屑邪褑懈褟
-
孝械泻褍褖懈泄 褋褌邪褌褍褋: 袨锌褍斜谢懈泻芯胁邪薪芯袛邪褌邪 锌褍斜谢懈泻邪褑懈懈: 2016-02协褌邪锌: 袩芯写褌胁械褉卸写械薪懈械 写械泄褋褌胁懈褟 屑械卸写褍薪邪褉芯写薪芯谐芯 褋褌邪薪写邪褉褌邪 [90.93]
-
袙械褉褋懈褟: 2
-
孝械褏薪懈褔械褋泻懈泄 泻芯屑懈褌械褌 :香港六合彩开奖/TC 43ICS :13.140
- RSS&苍产蝉辫;芯斜薪芯胁谢械薪懈褟
袞懈蟹薪械薪薪褘泄 褑懈泻谢
-
袪邪薪械械
袨褌芯蟹胁邪薪芯香港六合彩开奖 389-3:1994
袨褌芯蟹胁邪薪芯香港六合彩开奖 389-3:1994/Cor 1:1995
-
小械泄褔邪褋
袨锌褍斜谢懈泻芯胁邪薪芯香港六合彩开奖 389-3:2016
小褌邪薪写邪褉褌, 泻芯褌芯褉褘泄 锌械褉械褋屑邪褌褉懈胁邪械褌褋褟 泻邪卸写褘械 5 谢械褌
协褌邪锌: 90.93 (袩芯写褌胁械褉卸写械薪芯)-
00
袩褉械写胁邪褉懈褌械谢褜薪邪褟 褋褌邪写懈褟
-
10
小褌邪写懈褟, 褋胁褟蟹邪薪薪邪褟 褋 胁薪械褋械薪懈械屑 锌褉械写谢芯卸械薪懈褟
-
20
袩芯写谐芯褌芯胁懈褌械谢褜薪邪褟 褋褌邪写懈褟
-
30
小褌邪写懈褟, 褋胁褟蟹邪薪薪邪褟 褋 锌芯写谐芯褌芯胁泻芯泄 锌褉芯械泻褌邪 泻芯屑懈褌械褌邪
-
40
小褌邪写懈褟, 褋胁褟蟹邪薪薪邪褟 褋 褉邪褋褋屑芯褌褉械薪懈械屑 锌褉芯械泻褌邪 屑械卸写褍薪邪褉芯写薪芯谐芯 褋褌邪薪写邪褉褌邪
-
50
小褌邪写懈褟, 薪邪 泻芯褌芯褉芯泄 芯褋褍褖械褋褌胁谢褟械褌褋褟 锌褉懈薪褟褌懈械 褋褌邪薪写邪褉褌邪
-
60
小褌邪写懈褟, 薪邪 泻芯褌芯褉芯泄 芯褋褍褖械褋褌胁谢褟械褌褋褟 锌褍斜谢懈泻邪褑懈褟
-
90
小褌邪写懈褟 锌械褉械褋屑芯褌褉邪
-
95
小褌邪写懈褟, 薪邪 泻芯褌芯褉芯泄 芯褋褍褖械褋褌胁谢褟械褌褋褟 芯褌屑械薪邪 褋褌邪薪写邪褉褌邪
-
00
袩芯褟胁懈谢懈褋褜 胁芯锌褉芯褋褘?
袨蟹薪邪泻芯屑褜褌械褋褜 褋 FAQ
效邪褋褘 褉邪斜芯褌褘:
袩芯薪械写械谢褜薪懈泻 – 锌褟褌薪懈褑邪: 09:00-12:00, 14:00-17:00 (UTC+1)