Sound does not pass through vacuum. Sound waves require a medium such as air, water, or solid materials like steel to propagate because they travel through the mechanical vibration of particles in the medium. In vacuum, where there is an ...
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Sound waves cannot propagate in vacuum. Sound requires a medium (such as air, water, or solid materials) for transmission because it involves the mechanical vibration of particles in the medium.
Sonography is a biological method that uses ultrasonic sound. It involves the use of high-frequency sound waves to create images of the inside of the body. These sound waves, beyond the range of human hearing, are transmitted into the body ...
The effect of sound in the human ear lasts for approximately 1/10 second. This duration is known as the persistence of hearing or auditory persistence. It represents the time during which the auditory nerves continue to transmit signals to the ...
The walls, ceiling, and floor of a good auditorium are covered with fibrous materials like carpet and glass fiber to prevent echo by absorbing sound. These materials dampen sound waves, reducing reverberation and ensuring clearer acoustics for the audience. By ...
To hear an echo distinctly, the time interval between the original sound and the echo should be more than 1/10 seconds. This time delay allows the reflected sound waves to travel a sufficient distance before reaching the listener’s ears, ensuring ...
The working system of radar is based on reflection of radio waves. Radar (Radio Detection and Ranging) uses radio waves transmitted from an antenna. These waves are directed towards an object, and some of them reflect back to the radar ...
To hear a clear echo, there should be a minimum distance between the reflecting plane and the sound source of 17 meters. This distance ensures that the time delay between the original sound and its reflected sound is perceptible to ...
The cause of echo is reflection of sound. When sound waves encounter a smooth and hard surface, such as a wall or cliff, they bounce back towards the source. If the reflected sound reaches the listener’s ears distinctively after the ...
The velocity of sound in air increases with increasing temperature. This is because warmer air has more energy, causing air molecules to move faster and transmit sound waves more quickly.