free sound field 中文意思是什麼
free sound field
解釋
無聲場-
Acoustics - test code for the determination of acoustical characteristics of sound barriers installed in a free field
聲學.無聲波場中安裝的隔音設備的聲學特性測定用試驗規程 -
Were used for this study. durations of tone and weak white noise bursts used as sound stimuli were both 40 ms ( 2 - ms rise - decay times ), and delivered synchronally at 2 per second in free field. 177 neurons were obtained in this experiment, and frequency tuning curves ( ftcs ) of 76 ic neurons were measured in our study
本實驗共用12隻健康、聽力正常的成年小鼠，雌雄不拘，共獲得177個神經元，測量了76個神經元的頻率調諧曲線（ frequencytuningcurve ， ftc ） ，發現弱噪聲對神經元ftc的影響有三種類型：銳化、拓寬和基本不受影響。 -
We also demonstrated that one corticofugai pathway is that auditory cortex sends excitatory inputs to icx and then sends inhibitory inputs to icc from icx. under free field sound stimulation conditions, we studied the sound direction effect on frequency tuning curves of inferior collicular ( ic ) neurons
本研究首次提出了聽皮層調制皮層下神經元方向性性信息的概念，並發現，下丘神經元頻率調諧的方向敏感性的形成中，聽皮層的下行調制有重要作用。 -
Acoustics. determination of sound power levels of noise sources using sound prssure. engineering method in an essentially free field over a reflecting plane
聲學.使用聲壓法對噪聲源聲強級的測定.反射平面上基本無聲波場的工程測試法 -
Acoustics - determination of sound power levels of noise sources using sound pressure - engineering method in an essential free field over a reflecting plane iso 3744 : 1994 ; german version en iso 3744 : 1995
聲學.使用聲壓的噪聲源聲音強度級的測定.在一個基本 -
Acoustics. noise emitted by machinery and equipment. measurement of emission sound pressure levels at a work station and at other specified positions. engineering method in an essentially free field over a reflecting plane
聲學.機械和設備排放的噪聲.工作站和其它規定場所聲壓級的測量.反射平面上基本無聲波場的工程測試法
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