A 正确答案:A 解析:本题问按照文章内容,来自电视广告中的最大音量怎样。利用查阅式阅读法,我们可以在文章第一段第四句和第二段最后一句中找到相关信息。从这两个句子中我们知道电视广告的音量并未超过其他节目的音量。因此,本题的正确答案应是选择项A“其最大音量没有超过其他节目的音量”。选择项B错,广告节目...
3According to the passage, the maximum intensity of sound coming from commercials___. A.does not exceed that of programsB.is greater than that of programsC.varies over a large range than that of programsD.is less than that of programs 4{{B}}TEXT C{{/B}}According to the passage...
The ___ of sound can be measured in decibels. A. intensity B. volume C. pitch D. tone 相关知识点: 试题来源: 解析 A。“intensity”强度,声音的强度可以用分贝测量;“volume”音量;“pitch”音高;“tone”语气,这里指声音强度,所以选 A。反馈 ...
This chapter reviews various measurement techniques for sound intensity, recording and reproduction, and the Doppler effect. The intensity of a sound wave at any point is defined as the energy per second that is carried across unit area normal to the direction of travel of the wave at that ...
Fechner law.Let /denote the intensity of a sound .The least intense sound that can be heard is I'=10^(-12) watt/m^2 at a frequency of 1000 cycles/sec(this value is called the threshold of audibility).If L denotes the loudness of a sound,measured in decibels,then L=10log(I/I')...
Pitch is determined by: a. the amplitude of the sound wave b. the number of molecules of air affected by the sound-producing object c. the frequency of the sound wave d. the time it takes for a sound to reach the ear Due to the range of ...
As the distance from the sound source increases, what happens to the sound intensity? A. It increases. B. It remains the same. C. It decreases. D. It becomes zero. 相关知识点: 试题来源: 解析 C。中文解析:文中提到在封闭房间里测量不同距离处的声音强度,发现随着距离声源的距离增加,声音强度...
1.Herman Melville’s novel___is a tremendous chronicle of a whaling voyage in pursuit of a seemingly supernatural white whale.【答案】Moby Dick 【解析】《白鲸》是一部以捕鲸生涯为题材的小说，一位名叫亚哈（Ahab）的“皮廓德号”（Pequod）捕鲸船船长带领全体船员，追捕一条叫做“莫比·迪克”的大白鲸...
Intensity Level: β = 10 log ( II0 ) I0=10−12W/m2 I W/m2 We will use these steps, definitions, and equations to calculate the intensity level of a sound wave in the following two examples. Example 1 If a speaker emits a sound of intensity30W/m2, what intensity level, in decibe...
The hyperacusis patient experiences a great deal of discomfort and for that reason they seek quiet and protected places. In the normal hearing ear when the intensity of a sound is progressivel 听觉过敏意味着容忍为声音的大声崩溃了,以便几乎所有声音是难受地大声的。 听觉过敏患者体验很多难受,并且为...