The calculated results show that strong vibrating source, low gravitational level and sound medium with large density and small sound speed will enhance the levitation ability.
结果表明，提高声源强度、降低重力水平或者采用密度大声速小的气体介质有利于提高声悬浮能力。
Human auditory perceive not only includes the level, tone and timbre of sound, but also the sound location, which is called the spatial hearing ability.
在人的听觉感受中，除了声强、音调和音色外，还包括对声音空间特性的感觉，这就是人耳的空间听觉能力。
Based on the phenomenon that some English letters possess sound symbolic meanings, this article concludes that sound symbolism starts from letter level.
本文从某些英语字母具有语音象征含义这一角度出发，认为语音象征现象基于字母层面。
Booster compressor noise has the characteristics of wide frequency band, intense low frequency sound and considerably high total sound pressure level.
增压机噪声具有频带宽、低频声强烈，且总声级又相当高的特性。
Impulse sound pressure level and sound power level and sound power increase along with the increasing of detonation frequency.
脉冲声压级、声功率级、声功率随爆震频率的提高而提高。
Protection of ear to reduce sound pressure on it is necessary if the ear is to be subjected to noise at a sound pressure level more than 85 decibels continuously.
如果耳朵要连续承受声压为85分贝以上的噪音，则必须加以保护，以减低它所承受的声压。
With the measurement of average sound pressure level and sound power level, the noise reduction result of the oil pan made by sandwich steel plate was proved.
通过平均声压级和声功率级的测试验证了复合钢板试制的油底壳的降噪效果。
By Combining acoustics with electrics, and based on sound pressure level a calculating method was presented to determine the magnititude of electric-power inputting to sound-box.
将声学原理与电学原理结合起来，提出了一种根据空间声压级确定输入到音箱中的电功率大小的计算方法。
This paper analyzes the three components of the system: the elevator protocol convert card embedded sound player, up level sound management software.
分析了系统的三个组成部分：电梯协议转换卡、嵌入式语音播放器、上层语音管理软件。
High Level interfaces, These provide a high fidelity connection capability with the original sound system in your car, giving you all the original features with great Genesis sound quality.
高电平装置为原音响系统提供高保真的效果，并最大限度地重现原有的音质。
System hardware circuit audio digital signal source achieve this functions: sound signals, sound intensity level control, data communications, liquid crystal display, alarm and power.
系统硬件电路包括音频数字信号源实现声音信号产生、数字声强级控制、多机数据通信、液晶显示和电源等模块单元。
Peoples sense on noise lies not only on the sound level but also on the frequencies of sound wave.
人们对噪音的感觉不但取决于声级的大小，而且还与噪音的频率有关。
The minimum fluidization velocity has a minimum value when the frequency of sound waves approached 150 Hz, whereas it decreased as the sound pressure level was increased at the same sound frequency.
气泡尺寸和鼓泡频率随声压的增大而减小，随声波频率的增大先减小后增大。
Sound level meters indicate RMS sound, unless the measurements are qualified as instantaneous or peak sound level.
声级表表征的是均方根声音，除非是适合瞬间或峰值的度量。
Portable sound source for calibration of sound level meters and sound measuring system.
的便携式声级计和校准声源声测量系统。
The size and the sound reduction performance of the sound-proof door can be customized according to the sound insulation level, installation room and fire rating.
隔声门大小和隔声性能可按隔声等级要求、安装空间、防火等级选定。
Sound pressure level (SPL) sound pressure level is a measurement of the pressure fluctuations of a sound wave as it propagates through the air.
声压级别声压级别是表示在空气中传播的声波的起伏压。
Finally figures of direction coefficient of sound pressure level are given out. Then using these figures the relationship between sound power level and sound pressure level radiated by a fan in...
利用这些图就可方便地得到吸气管道内风机辐射声功率级和声压级的关系。
Finally figures of direction coefficient of sound pressure level are given out. Then using these figures the relationship between sound power level and sound pressure level radiated by a fan in...
利用这些图就可方便地得到吸气管道内风机辐射声功率级和声压级的关系。
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