A circuit arrangement for controlling the amplitude of an audio IF signal from a television signal which also comprises a video signal, by means of a device by means of which the controlling is effected with a first control time constant, is described. To bring the picture and sound ...
The use of a sound wave created by an external source and directed along the positive column of a nitrogen discharge in order to make the discharge pass to the contracted state is studied experimentally. A phenomenon involving a jump in the sound wave amplitude, caused by the discharge contract...
aThe envelope is the overall amplitude structure of a sound, so called because the sound just "fits" inside its envelope: what this means should be clear from a time-domain display of almost any interesting sound, zoomed out enough that the entire waveform is visible. 因为声音“适合”在它的...
Vol. 551: 45–52, 2016 doi: 10.3354/meps11731 MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Published June 9 OPEN ACCESS Evidence for light-controlled migration amplitude of a sound scattering layer in the Norwegian Sea Eirik Norheim1, Thor A. Klevjer2, Dag L. Aksnes1,* 1Department ...
<p>To answer the question about the wavelength, frequency, time period, and amplitude of a sound wave, we can break down each term step by step:</p><p><strong>Step 1: Define Wavelength</strong> - <strong>Wavelength (λ)</strong> is defined as the distanc
A sound with a large amplitude is ___. A. high-pitched B. low-pitched C. loud D. soft 相关知识点: 试题来源: 解析 C。原因:“Loudness is determined by the amplitude of the sound wave. A sound with a large amplitude is loud.”。 反馈...
百度试题 结果1 题目The pitch of a sound depends on its A. amplitude B. frequency C. wavelength D. speed 相关知识点: 试题来源: 解析 B。声音的音调取决于频率,频率越高,音调越高。反馈 收藏
where p is the density of the medium through which the sound is passing, c is the speed of the sound wavef is the frequency of the sound waveand K is a constant.Show that K has no units. 相关知识点: 试题来源: 解析为了确定常数 K 的单位,我们可以分析声强公式中所有涉及的物理量及其单位...
Wind turbine (WT) sound annoys some people even though the sound levels are relatively low. This could be because of the amplitude modulated "swishing" characteristic of the turbine sound,which is not taken into account by standard procedures for measuring average sound levels. Studies of sound ...
Research on acoustic holography method for the identification of sound source This paper presents a new method named Acoustical Holography which can be used to identify noise sources. A new formula of holography reconstruction is obtained, based on the Kirchhoff integral formula. Some simulating tests...