Sound is produced by vibrations. When an object vibrates, it makes sound. How is sound produced? A. By colors. B. By vibrations. C. By shapes. 相关知识点: 试题来源: 解析 B。解析:声音是由振动产生的,B 选项正确。A 选项颜色和声音产生无关,C 选项形状也不是声音产生的原因。
How does sound happen? A. When something vibrates or shakes、 B. When hitting at something、 C. When a ruler is put at the edge of the desk、 D. A and B、 相关知识点: 试题来源: 解析 A 提示:细节理解题。根据第二段第一句“But what is sound?Sound happens when something vibrates(...
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Before sound can travel, it needs to be created. For this to happen, there needs to be something that can vibrate which will result in the creation of waves. The vocal chords, for example, vibrate every time someone talks. Based on the pitch determines how the vocal chords vibrate. When ...
Set a vibrate-only timer on iPhone While the stock Clock app allows setting an alarm that makes no sound and only vibrates, this isn’t true for timers. When you go to theClock app>Timer>When Timer Ends, you’ll only find tones andStop Playing. There is no option to set the timer...
(for sound waves) is the apparent change in pitch as a sound approaches and then passes by Example: Train whistles at you while your standing by the tracks – it seems to be higher in pitch as it approaches, and lower after it passes by. The frequency (pitch) does not really change,...
Can sound be modified? The pitch of a sound is largely determined by the mass (weight) of the vibrating object. Generally, the greater the mass, the more slowly it vibrates and the lower the pitch. However, the pitch can be altered by changing the tension or rigidity of the object. Ca...
Sound. When a drum is struck, the drumhead vibrates and the vibrations are transmitted through the air in the form ofsound waves. When they strike the ear, these waves produce the sensation of sound. Terms used in the study of sound ...
Whose phone VIBRATES just a few feet from her under the table. Ki-Woo quickly silences his phone. Chung-Sook coughs to cover the sound. She glances over at Da- Hae to see if Da-Hae heard it too. She did. Da-Hae looks around, confused. 98. Ki-Woo hurriedly switches his pho...
There's recurring sound and vibration when I have unread notifications. How do I make it stop?If your phone vibrates or sounds a soft alert at a fixed interval, the Unread notification reminder option in Accessibility settings may be turned on. Go to Settings, and then tap Accessibility. ...