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。
Snoring, like all other sounds, is caused by vibrations that cause particles in the air to form sound waves. For example, when we speak, our vocal cords vibrate to form our voice. When our stomach growls (borborygmus), our stomach and intestinesvibrate as air and food move through them....
Unless you’re driving a machine from Mad Max, this material tends to be more flexible as it’s built to crumple in a collision - which means wind or even your own door speakers can cause vibrations that create unwanted sound. Your car door might be great for safety, but it’s not ...
To understand how your ears hear sound, you first need to understand just what sound is. An object produces sound when it vibrates in matter. This could be a solid, such as earth; a liquid, such as water; or a gas, such as air. Most of the time, we hear sounds traveling through ...
Does it have a frequency like sound? And what are some of the common properties of light, such as absorption, reflection, refraction and diffraction? You might think scientists know all the answers, but light continues to surprise them. Here's an example: We've always taken for granted ...
you’re in a crucial meeting, or you simply want some quiet time, all phones come with aSilent Modeto keep things hush. However, staying silent might cause you to miss important calls or messages. To address this, you can enable thevibratefeature over silent mode. This provides you with ...
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...
In the case of acoustically absorptive materials such as acoustical ceiling tile or acoustical wall panels, the sound waves striking the material also cause the fibers to vibrate thereby creating and energy to heat conversion that reduces the sound energy. Acoustical ceiling tiles are the most common...
Preferring instead to trick, trap or to steal “For what good is a feast,” they seem to say, “If it’s so hard earned as to spoil my day. Or end my days or cause on me The pain and suffering I intended to thee.” And so they wait, and pick and choose, ...
1. The Do Not Disturb mode will cause the phone to not ring when there is a call. 2. The phone is in silent/vibrate mode. 3. The custom ringtone audio source file may be not compatible with the phone, so the phone will not ring when there is an incoming call. ...