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What is the Definition of an Echo?

Answer – An echo is defined as a delayed sound that is bounced off a surface due to the reflection of sound waves.

Explanation:

The word “echo” comes from the Greek word ēchō, which means “sound.” The surface from which this sound is reflected could be a wall, a mountain, or any other obstructing object. The greater the distance between the source of the sound and the surface, the longer the pause before the echo is heard.

Echoes are natural phenomena, and some animals (bats and dolphins) even use them for navigation.

Popular Questions

Asaad, a grade 11 student, completed a lab activity to find the speed of sound in air using a closed-air column. He measured the temperature of the room to be 21°C. Using a tuning fork with a frequency of 1040 Hz, he obtained the following resonant lengths for the closed air column: Observations: L1 = 7.4 cm, L2 = 22.5 cm, L3 = 36.7 cm. (A) Use the resonant lengths to do three calculations to find the wavelength. Find the average wavelength and use that in further calculations.

The speed of sound at sea level is 340.29 m/s. If lightning strikes 13.5 miles away, how long (in minutes) does it take for the sound of the thunder to reach you? (use the speed as a conversion factor.) The answer must be given in only one equation.

If the intensity of a sound increases from 1 Bel (10 dB) to 3 Bel (30 dB), what is the increase in energy per square meter? (A) 1.41 (square root of 2) times the energy, (B) 2 times the energy, (C) 100 times the energy, or (D) 20 times the energy.

Label each of these waves as either a “transverse wave” or a “longitudinal wave.” 1. Ocean wave, 2. Sound wave, 3. Lightwave, 4. Wave on a rope (made by “flicking” the rope).

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Acoustics Physics Sound Waves

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