暖暖爱视频免费,国产成人涩涩涩视频在线观看,中文在线中文资源,日本亚洲色大成网站WWW久久



共找到 150 條與 基準(zhǔn)聽(tīng)閾級(jí) 相關(guān)的標(biāo)準(zhǔn),共 10 頁(yè)

GB/T 4854的本部分規(guī)定了為建立基準(zhǔn)聽(tīng)閾級(jí)標(biāo)準(zhǔn)值而確定受試者聽(tīng)閾的測(cè)試條件

Acoustics.Reference zero for the calibration of audiometric equipment.Part 9:Preferred test conditions for the determination of reference hearing threshold levels

GB/T 4854的本部分規(guī)定了短時(shí)程測(cè)試信號(hào)的基準(zhǔn)聽(tīng)閾級(jí)。本部分適用于對(duì)使用這種信號(hào)的測(cè)聽(tīng)設(shè)備的校準(zhǔn)

Acoustics.Reference zero for the calibration of audiometric equipment.Part 6:Reference hearing threshold levels for test signals of short duration

本文件規(guī)定的下列內(nèi)容,適用于純音骨導(dǎo)測(cè)聽(tīng)的骨振器的校準(zhǔn)。a)基準(zhǔn)等效閾振動(dòng)力級(jí),對(duì)應(yīng)于年輕耳科正常人骨導(dǎo)測(cè)聽(tīng)的聽(tīng)閾; b)骨振器的基本特性及其與被試和與力耦合器的耦合方法; c)加于非測(cè)試耳的掩蔽噪聲的基本特性和基準(zhǔn)級(jí)。在校準(zhǔn)聽(tīng)力計(jì)時(shí),實(shí)際使用本文件的指南見(jiàn)附錄B。基準(zhǔn)等效閾振動(dòng)力級(jí)是指通過(guò)振動(dòng)器

Acoustics—Reference zero for the calibration of audiometric equipment—Part 3:Reference equivalent threshold vibratory force levels for pure tones and bone vibrators

本部分規(guī)定在下列使用條件下校準(zhǔn)測(cè)聽(tīng)設(shè)備的基準(zhǔn)聽(tīng)閾。 a)受試者不在場(chǎng)時(shí)的聲場(chǎng),由一自由平面行波場(chǎng)(自由場(chǎng))或一擴(kuò)散場(chǎng)構(gòu)成。自由場(chǎng)條件下,受試者應(yīng)面對(duì)聲源(前向入射)。 b)自由場(chǎng)條件下,聲信號(hào)應(yīng)為純(正弦)音;擴(kuò)散場(chǎng)條件下,則為1/3倍頻帶白噪聲或粉紅噪聲。 c)聲壓級(jí)的測(cè)量,應(yīng)在受試者不在場(chǎng)

Acoustics.Reference zero for the calibration of audiometric equipment.Part 7:Reference threshold of hearing under free-field and diffuse-field listening conditions

為推動(dòng)全世界在聽(tīng)閾級(jí)測(cè)量的表示中的統(tǒng)一性與一致性,本標(biāo)準(zhǔn)為聽(tīng)力計(jì)用的聽(tīng)閾級(jí)的分度規(guī)定了基準(zhǔn)零級(jí)。 本標(biāo)準(zhǔn)闡述的資料可直接用于聽(tīng)力計(jì)的校準(zhǔn),即表示為在GB/T7342中耦合腔測(cè)量的兩種不同標(biāo)準(zhǔn)耳機(jī)的響應(yīng),以及在GB/T7614中仿真耳上測(cè)量的其他壓耳式耳機(jī)的響應(yīng)。 本標(biāo)準(zhǔn)基于若干

Acoustics--Reference zero for the calibration of audiometric equipment--Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones

本標(biāo)準(zhǔn)規(guī)定在下列使用條件下校準(zhǔn)測(cè)聽(tīng)設(shè)備的基準(zhǔn)聽(tīng)閾。 a)聽(tīng)者不在時(shí)的聲場(chǎng)由一自由平面行波(自由場(chǎng))或一擴(kuò)散場(chǎng)構(gòu)成。若為自由平面行波,聲源應(yīng)在聽(tīng)者正前方(正入射)。 注1:有關(guān)自由場(chǎng)測(cè)聽(tīng)所選聲入射角偏離正入射時(shí)聽(tīng)閾的修正值,見(jiàn)GB/T16403。 b)若為自由場(chǎng),聲信號(hào)應(yīng)為純

Acoustics--Reference zero for the calibration of audiometric equipment--Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions

本標(biāo)準(zhǔn)規(guī)定的下列內(nèi)容,適用于純音骨導(dǎo)測(cè)聽(tīng)的骨振器的校準(zhǔn)。 a)基準(zhǔn)等效閾力級(jí),相當(dāng)于耳科正常年青人骨導(dǎo)測(cè)聽(tīng)的聽(tīng)閾。 注1:前額和乳突兩部位間基準(zhǔn)等效閾力級(jí)的暫定差值列于附錄C。 b)骨振器的基本特性及其與被試者和與機(jī)械耦合器的耦合方法。 c)加于非測(cè)試耳的掩蔽噪聲的

Acoustics--Reference zero for the calibration of audiometric equipment--Part 3: Reference equivalent threshold force levels for pure tones and bone vibrators

GB/T 4854的本部分規(guī)定了純音氣導(dǎo)聽(tīng)力計(jì)聽(tīng)閾級(jí)分度的基準(zhǔn)零級(jí)。 本部分闡述的資料,即在符合GB/T 7342規(guī)定的耦合腔中測(cè)量的兩種不同型號(hào)標(biāo)準(zhǔn)耳機(jī)的響應(yīng),以及在符合GB/T 7614規(guī)定的仿真耳上測(cè)量的(4.3中規(guī)定的)其他型號(hào)壓耳式耳機(jī)的響應(yīng),可直接用于聽(tīng)力計(jì)校準(zhǔn)

Acoustics-Reference zero for the calibration of audiometric equipment-Part 1:Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones

Verification Regulation of Pure-tone Audiometers

本部分規(guī)定在下列使用條件下校準(zhǔn)測(cè)聽(tīng)設(shè)備的基準(zhǔn)聽(tīng)閾。 a) 受試者不在場(chǎng)時(shí)的聲場(chǎng),由一自由平面行波場(chǎng)(自由場(chǎng))或一擴(kuò)散場(chǎng)構(gòu)成。自由場(chǎng)條件下,受試 者應(yīng)面對(duì)聲源(前向人射)。 b) 自由場(chǎng)條件下,聲信號(hào)應(yīng)為純(正弦)音;擴(kuò)散場(chǎng)條件下,則為1/3倍頻帶白噪聲或

Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions

Acoustics - Reference zero for the calibration of audiometric equipment - Part 9: Preferred test conditions for the determination of reference hearing threshold levels

Acoustics - Reference zero for the calibration of audiometric equipment - Part 9: Preferred test conditions for the determination of reference hearing threshold levels

Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions - Amendment 1: Reference threshold of hearing at 20 Hz and 18000 Hz under free-field l

Acoustics - Reference zero for the calibration of audiometric equipment - Part 9 : preferred test conditions for the determination of reference hearing threshold levels.

Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions




Copyright ?2007-2025 ANTPEDIA, All Rights Reserved
京ICP備07018254號(hào) 京公網(wǎng)安備1101085018 電信與信息服務(wù)業(yè)務(wù)經(jīng)營(yíng)許可證:京ICP證110310號(hào)
頁(yè)面更新時(shí)間: 2025-04-11 23:24