Elephants' Communication through Low-Frequency Sound Waves

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Why is reflection of sound more prominent on a rigid and smooth surface?

Soft and irregular surfaces absorb more sound energy (correct)

Rigid and smooth surfaces scatter sound waves

Soft and irregular surfaces reflect sound more effectively

Rigid and smooth surfaces absorb more sound energy

How do porous materials like draperies and rugs affect sound energy?

Absorb large amount of sound energy (correct)

Reduce sound transmission speed

Increase noise pollution

Enhance sound reflection

What happens when sound reflects multiple times in a closed room?

Changes direction towards the source

Refracts into different frequencies

Becomes garbled due to reverberations (correct)

Speeds up with each reflection

Why is it important to balance reverberation and absorption in the design of auditoriums?

To achieve even sound distribution Signup and view all the answers

In lecture halls, why are curved ceilings preferred for sound distribution?

To ensure sound reaches all corners of the hall Signup and view all the answers

Why are reflective surfaces placed behind the stage in auditoriums?

To direct sound to the audience Signup and view all the answers

What is the role of elephants' large ears in their communication?

To detect low frequency sound waves with long wavelengths Signup and view all the answers

In which type of medium can sound waves NOT be transmitted?

Vacuum Signup and view all the answers

How does the speed of sound in a liquid compare to the speed of sound in gases?

Five times faster than the speed of sound in gases Signup and view all the answers

Which physical conditions affect the speed of sound in air?

Temperature, pressure, and humidity Signup and view all the answers

What relation is used to find the speed of sound?

$v = f \times \lambda$ Signup and view all the answers

Why does the speed of sound differ in solids, liquids, and gases?

Because each medium has particles that can vibrate at different rates Signup and view all the answers

What is the role of the diaphragm when placed on the patient's body?

Generating acoustic pressure waves Signup and view all the answers

Why does dipping a vibrating tuning fork into a glass of water cause a splash?

The force of the tuning fork pushes the water Signup and view all the answers

How do light waves differ from sound waves in terms of propagation?

Light waves are electromagnetic and can pass through a vacuum Signup and view all the answers

What happens to the speed of sound as temperature increases?

Increases Signup and view all the answers

What is the purpose of the bell jar apparatus described in the text?

To demonstrate that sound can travel through a vacuum Signup and view all the answers

How does the medium affect the speed of sound propagation?

The denser the medium, the slower the speed of sound Signup and view all the answers