
[声] 超声波
Ultrasound wave has been widely utilized in various industries for its physical and sonochemistry effects.
超声波具有多种物理和声化学效应,应用广泛。
The effect of ultrasound wave on yield of products was investigated and the structure and compositions of the as-prepared products were characterized by IR and element analysis.
考察超声波作用对合成产物产率的影响,用红外光谱及元素分析表征合成产物的结构;
Study on the extraction of Polyphenols Substance(PS)from Kujingcha was carried out by ultrasound wave and the effects of experimental factors on experimental results were discussed.
对超声波辅助提取苦荆茶中多酚类物质的工艺进行研究,讨论了各实验因素对实验结果的影响。
Effects of the slice depth, syrup concentration, osmotic duration, power of ultrasonic wave, time of ultrasound treatment on the osmotic dehydration of carrot were stu***d too.
探讨了胡萝卜切片厚度、浸泡液浓度、渗透时间、超声波的功率和超声波处理时间等几种因素对胡萝卜糖溶液渗漏脱水的影响。
Ultrasound tomography technique is to determine from scattered ultrasonic wave the internal material properties of object.
超声层析成像技术是指根据物体周围的散射波,反演物体内部结构图像的技术。
|ultrasonic wave;[声]超声波
超声波(Ultrasound Wave)详解
一、定义与基础特性
超声波(Ultrasound)指频率高于人类听觉上限(通常为20 kHz)的声波,属于机械波的一种,需通过弹性介质(如液体、固体)传播。其本质是介质粒子在声压作用下的周期性振动,能量以纵波形式传递。
二、核心物理特性
三、传播机制
超声波在介质中传播时遵循声学波动方程:
$$
abla p - frac{1}{c} frac{partial p}{partial t} = 0 $$
其中 ( p ) 为声压,( c ) 为介质声速。声速取决于介质密度 ( rho ) 和压缩模量 ( K ):
$$ c = sqrt{frac{K}{rho}} $$
不同组织声速差异(如肌肉约1540 m/s,骨骼 >3000 m/s)是医学成像对比度的基础。
四、主要应用领域
权威参考资料
Hobbie RK, Roth BJ. Intermediate Physics for Medicine and Biology. Springer.
超声波(Ultrasound wave)是指频率高于人类听觉范围(通常超过20千赫兹)的声波,属于机械波的一种。以下是其详细解释:
声速公式为: $$ v = f cdot lambda $$ 其中,( v )为波速(介质决定),( f )为频率,( lambda )为波长。
若需进一步了解具体应用场景或技术原理,可提供更多背景信息以便补充解答。
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