Sound Waves and Ultrasonic Principles Quiz

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Which of the following is NOT a use of ultrasonic sound?

Joining plastic surfaces

Generating electricity (correct)

Sterilizing liquids

Visualizing heartbeats

What is a key requirement for the reflection of sound according to the laws of reflection?

The sound must be generated at a high frequency

The surface must be warm

The sound must be aimed at a curve

The surface must be either smooth or rough (correct)

In which instance is sound more likely to be absorbed rather than reflected?

By a wooden table

By a concrete wall

By a glass window

By a thick carpet (correct)

When performing the reflection of sound experiment, which of the following measurements would you expect to be equal?

The angle of incidence and the angle of reflection Signup and view all the answers

What characteristic do most materials classified as good reflectors of sound share?

They are hard and flat Signup and view all the answers

What is the minimum distance required for a clear echo to be heard at 22°C?

17.2 meters Signup and view all the answers

Which component does a SONAR system NOT have?

Amplifier Signup and view all the answers

What phenomenon allows echoes to be heard multiple times?

Continuous reflections of sound waves Signup and view all the answers

In an enclosed space with loud music, what mainly affects reverberation?

Absorption of sound by surfaces Signup and view all the answers

At what speed does sound travel in air at 22°C?

344 m/s Signup and view all the answers

How does sound travel in different mediums at a fixed temperature?

Sound travels fastest in solids. Signup and view all the answers

What is the relationship between the wavelength, frequency, and velocity of sound?

Velocity is the product of wavelength and frequency. Signup and view all the answers

What effect does increasing temperature have on the velocity of sound in a medium?

It increases the velocity of sound. Signup and view all the answers

Who were the first physicists to calculate the speed of sound, and what method did they use?

Borelli and Viviani measured the time between a flash and sound. Signup and view all the answers

Given different mediums, which substance has the highest speed of sound at 25°C?

Nickel Signup and view all the answers

What role does gel play in the sonography procedure?

It improves the contact between the probe and the skin. Signup and view all the answers

Which area of the ear is primarily responsible for transmitting sound signals to the brain?

Inner Ear Signup and view all the answers

What is one of the grave misuses of sonography technology mentioned?

Female foeticide Signup and view all the answers

How does the sonography machine create images of internal organs?

By detecting sound waves reflected from internal organs. Signup and view all the answers

What is a characteristic of the sonography method in relation to patient experience?

It is a painless procedure. Signup and view all the answers

What is the primary purpose of a transmitter in the SONAR system?

To produce and transmit ultrasonic sound waves Signup and view all the answers

How does a SONAR receiver contribute to determining the distance to an object?

It notes the time difference between transmission and reception. Signup and view all the answers

What effect does reverberation have on sound clarity in an auditorium?

It can make the sound difficult to understand clearly. Signup and view all the answers

In the context of SONAR, what role does the velocity of sound in water play?

It is essential for calculating the distance based on time differences. Signup and view all the answers

What are some of the common applications of SONAR technology?

Identifying underwater geological formations and locating submarines Signup and view all the answers

What describes the particle motion in longitudinal waves?

Particles oscillate parallel to the direction of wave propagation. Signup and view all the answers

Which medium allows sound to travel with the highest velocity?

Solids such as steel. Signup and view all the answers

Which statement correctly describes the relationship between frequency and the velocity of sound in a medium?

Velocity is independent of frequency. Signup and view all the answers

What is the correct formula for calculating the speed of sound?

$ v = A imes f$ Signup and view all the answers

Which term represents the maximum change in pressure of a sound wave?

Amplitude Signup and view all the answers

Which of the following correctly states a characteristic of sound waves?

They cause regions of compression and rarefaction. Signup and view all the answers

In which condition does the velocity of sound generally increase?

As the temperature of the medium increases. Signup and view all the answers

Which of the following best describes a sound wave's wavelength?

The distance between two successive compressions or rarefactions. Signup and view all the answers

What role does the pinna play in the process of hearing?

It collects and funnels sound waves into the middle ear. Signup and view all the answers

Which component of the ear is primarily responsible for converting vibrations into electrical signals?

Cochlea Signup and view all the answers

What happens to sound waves when they strike the eardrum?

They cause pressure changes that result in vibrations. Signup and view all the answers

Why should one avoid listening to excessively loud music through earphones?

It may lead to permanent damage to the eardrum. Signup and view all the answers

Which part of the ear contains a chain of three bones that transmit vibrations?

Middle ear Signup and view all the answers

What is the effect of increasing the density of a gas on the velocity of sound?

It reduces the velocity to half its original value. Signup and view all the answers

How does the molecular weight of a gas influence the velocity of sound?

Increased molecular weight decreases the velocity. Signup and view all the answers

Which type of sound would be classified as infrasound?

A pendulum swinging back and forth. Signup and view all the answers

Which statement correctly describes the relationship between temperature and the velocity of sound in a gaseous medium?

Velocity of sound is directly proportional to the square root of the temperature. Signup and view all the answers

What phenomenon do bats use to navigate in the dark?

Echolocation. Signup and view all the answers

What is the primary effect of covering the ears of bats?

It completely disables their echolocation ability. Signup and view all the answers

Which of the following abilities is NOT typically found in human hearing?

Detecting infrasound frequencies. Signup and view all the answers

What is the relationship between pressure and the velocity of sound at a fixed temperature?

The velocity of sound remains constant regardless of pressure. Signup and view all the answers

What is the correct calculation for the velocity of sound given a frequency of 1.5 kHz and a wavelength of 25 cm?

375 m/s Signup and view all the answers

How deep is the sea if the time taken for an echo is 4 seconds?

3100 m Signup and view all the answers

What is the frequency of sound waves with a velocity of 340 m/s and wavelength of 1 cm?

34000 Hz Signup and view all the answers

Given that sound travels at 1550 m/s in seawater, how long does it take to hear an echo after causing a sound pulse at a depth of 3100 m?

4 s Signup and view all the answers

Which of the following statements is true regarding sound frequencies and human hearing?

Frequencies above 20,000 Hz are inaudible to humans. Signup and view all the answers