Sound

The speed of sound depends on the ________ of the medium.

Which of the following is used to produce sound in a flute?

Soft sounds have ________ amplitude.

If the time period of a wave is 0.02 seconds, its frequency is:

In a longitudinal wave, the distance between a compression and its nearest rarefaction is:

The frequency of a wave is the number of oscillations per unit time. If a wave completes $10$ oscillations in $1$ millisecond, what is its frequency?

If you hear a thunder $5$ seconds after you see a flash of lightning, how far away is the lightning? (Speed of sound = $346$ m/s; ignore time taken by light)

The loudness of sound is measured in units of:

Sound cannot travel through vacuum because:

A tuning fork has a frequency of $256\ Hz$. This means it produces:

Which characteristic of a sound wave is related to its intensity?

Speed of sound is $340\text{ m/s}$ and frequency is $1700\text{ Hz}$. The wavelength is:

Mechanical waves like sound require a _____ for propagation.

The time period of a wave having frequency $200\text{ Hz}$ is:

A sound wave of frequency $500\text{ Hz}$ has a speed of $350\text{ m/s}$. The distance between a compression and the next rarefaction is:

An ultrasound wave has a frequency of $40\text{ kHz}$. Its time period is:

If the wavelength of a sound wave is doubled and the frequency remains same, the speed of sound will:

If the frequency of a tuning fork is $400\text{ Hz}$ and the speed of sound is $320\text{ m/s}$, the distance traveled by sound while the fork completes $20$ vibrations is:

A person hears an echo $2$ seconds after shouting near a cliff. If the speed of sound is $340\text{ m/s}$, how far is the cliff?

Which of the following is correct regarding the speed of sound ($v_s$) and the speed of light ($v_l$)?

Which factor does NOT affect the speed of sound in a gas?

Sound speed in air at $20^\circ C$ is $344\text{ m/s}$. In how much time will it cover $1\text{ km}$?

What is the speed of sound in Copper?

In a given medium, if the frequency of sound increases, the speed of sound:

A sound pulse is transmitted through a sequence of three different media of identical lengths as shown in the diagram. Let $t_1$, $t_2$, and $t_3$ be the time intervals taken by the sound to travel through the Aluminium, Water, and Air segments respectively. Which of the following correctly compares these time intervals?

In which of the following media is the speed of sound highest?

What is the speed of sound in a medium if a wave of frequency $400\text{ Hz}$ has a wavelength of $2.5\text{ m}$?

A sonar echoes from a shoal of fish $0.4\text{ s}$ after transmission. If the speed of sound in water is $1500\text{ m/s}$, how far is the shoal?

A wave has a frequency of $10\text{ Hz}$. What is the time period, and how many cycles does it complete in $1\text{ minute}$?

A man stands between two cliffs $X$ and $Y$ such that he is $680\text{ m}$ from $X$ and $1020\text{ m}$ from $Y$. He fires a gun. Find the time interval between the first and second echoes he hears. (Speed of sound $= 340\text{ m/s}$)

A ship sends an ultrasonic sound into the sea. If the echo is received after $4 \text{ s}$ and the speed of sound in water is $1500 \text{ m/s}$, what is the depth of the sea?

Which of these is the most common reason for hearing multiple echoes in mountains?

If a sound wave strikes a surface normally (at $90^\circ$ to the surface), what is the angle of reflection?

The angle of incidence for a sound wave is the angle between:

A marine research vessel uses SONAR to identify underwater features. It receives two reflected signals from the same vertical line: the first from a submerged shipwreck after $1.2\text{ s}$ and the second from the ocean floor after $1.8\text{ s}$. Based on the arrangement in the diagram, what is the distance between the shipwreck and the ocean floor? (Assume the speed of sound in seawater is $1500\text{ m/s}$)

An architect is designing a cinema hall and wants to minimize the persistence of sound caused by reflections from the ceiling. According to the path of sound shown in the diagram, which material should be applied to the surface $C1$ to best achieve this by absorbing the incident sound waves?

Excessive reverberation is prevented in a theater by using carpets on the floor. This works because carpets are:

A stationary research station $S_1$ and a submarine $S_2$ are both initially at a distance of $1500\ m$ from a vertical underwater cliff. At $t = 0\ s$, $S_1$ emits a SONAR pulse. At the same instant, $S_2$ starts moving directly towards the cliff at a constant speed of $100\ m/s$. Given the speed of sound in seawater is $1500\ m/s$, how much time will elapse from the moment of emission until $S_2$ detects the reflected pulse?

A boy stands in a valley between two mountains. He claps his hands and hears the first echo after $2\ s$ and the second echo after $3.5\ s$. If the speed of sound is $340\ m/s$, the distance between the two mountains is:

Why do we hear a louder sound when a source is placed at the focus of a concave reflector?

When sound reflects from the seafloor and is detected in SONAR, the phenomenon used is:

Moths can hear the very high frequency squeaks of which animal?

Which of the following frequencies is NOT audible to the human ear?

A sound of frequency $15\text{ Hz}$ is:

In the cleaning of electronic components using ultrasound, the dust particles detach because:

An object vibrating at $15,000 \text{ Hz}$ produces sound. This sound is:

Which of these is a characteristic of ultrasonic waves that makes them useful for 'seeing' inside the body?

An ultrasound signal of $50\text{ kHz}$ is sent through a metal rod. If the speed of sound in the rod is $5000\text{ m/s}$, the wavelength of the signal inside the rod is:

What is the frequency of a sound wave whose wavelength is $10\text{ m}$ in a medium where the speed of sound is $1000\text{ m/s}$, and how would you classify it?

Which of the following statements about ultrasound is FALSE?

The stirrup bone is attached to the ________.

Vibrations are passed from the hammer to the ________.

Which part of the ear is responsible for turning sound into a format the brain can understand?

Electrical signals are sent to the brain through which nerve?

The middle ear is an air-filled chamber, while the inner ear is filled with a specialized fluid. Why is it physically necessary for the three tiny bones (ossicles) to significantly amplify the pressure of the sound waves before they enter the cochlea?

For a person to perceive sound, energy is transformed through different states. Which of the following represents the correct sequence of these states as sound moves from the external environment to the auditory nerve?

Which physical quantity changes on the eardrum to make it vibrate?

Which structure is responsible for equalizing the pressure on either side of the eardrum?

The Modiolus is:

If the auditory nerve is damaged but the middle ear is intact, the resulting condition is called:

Which of these materials will allow sound to propagate?

What is the relation between frequency ($\nu$) and time period ($T$)?

If the amplitude of a sound wave is increased, the sound becomes:

A sound wave with a high frequency is perceived by humans as having:

When a sound wave is represented graphically, the peak of the curve is called a crest. What does this peak represent in terms of air pressure?

What occurs when the density of the particles in a medium is higher than the average density?

Which of the following produces sound by the vibration of a stretched membrane?

When sound travels from one point to another in a medium, the physical quantity that is NOT transported is:

A tuning fork makes $1024$ vibrations in $4 \text{ seconds}$. What is the distance traveled by the sound in air during one vibration of the fork? (Take speed = $340 \text{ m/s}$)

In which medium will sound travel the slowest at $25^{\circ}\text{C}$?

The speed of sound in Methanol at $25^\circ\text{C}$ is:

As sound waves move from water into air, the speed of sound:

The speed of sound in Glass (Flint) is approximately:

What is the speed of sound in Sulphur dioxide gas?

A sound wave propagates through a medium, creating a series of compressions and rarefactions as shown in the diagram. If the measured distance from the center of the first compression ($C_1$) to the center of the fourth compression ($C_4$) is $45\text{ cm}$, what is the wavelength ($\lambda$) of this sound wave?

When sound travels from a denser medium to a rarer medium (e.g., from water to air), its speed:

If the speed of sound in air at $25^{\circ}C$ is $346 \text{ m/s}$, how far will sound travel in $10 \text{ seconds}$?

The distance between the 1st and 11th compression of a sound wave is $2 \text{ m}$. If the frequency is $1700 \text{ Hz}$, the speed of sound is:

A sound wave travels $2000 \text{ m}$ in $5 \text{ s}$. If its wavelength is $0.5 \text{ m}$, find its frequency.

When sound waves travel from a hotter air layer to a colder air layer, what happens to their speed and direction (relative to the normal)?

In the standard experimental setup to verify the laws of reflection of sound, a vertical screen or partition is placed between the two tubes (the source tube and the listener's tube). What is the primary reason for using this screen?

Sound waves follow the law of reflection which states that the angle of incidence is _______ the angle of reflection.

If sound travels at $344\text{ m/s}$ and an echo is heard after $2\text{ s}$, what is the distance of the obstacle?

Why are carpets used in auditoriums?

If we want to reduce the 'rolling' effect of sound in a hall, we should increase the:

A clap is produced near a mountain. The echo is heard after $4\text{ seconds}$. Given the speed of sound is $330\text{ m/s}$, the distance to the mountain is:

A device used to find the distance, direction, and speed of underwater objects using sound reflection is:

How can the reverberation in a large hall be mathematically reduced based on Sabine's formula (Time $\propto \text{Volume} / \text{Absorption}$)?

A ship sends out ultrasound that returns from the seabed and is detected after $3.42\text{ s}$. If the speed of ultrasound through seawater is $1531\text{ m/s}$, what is the distance of the seabed from the ship?

A man stands in front of a big wall at a distance of $D$ meters. He fires a gun and hears the echo after $T$ seconds. He then moves a distance $d$ away from the wall and hears the echo after $t$ seconds. The speed of sound is:

The pressure variations in a longitudinal sound wave cause the ________ to move in and out.

The process of hearing ends when the ________ interprets electrical signals.

The hammer is attached to the ________.

The malleus is also known as the hammer because of its:

The diagram illustrates three different frequencies, $f1$, $f2$, and $f3$, produced by a signal generator. A technician needs to select the correct frequency for performing a medical 'Ultrasonography' scan. Which frequency is appropriate, and how is it classified?

Which part of the ear is the first to encounter the sound wave from the environment?

The vibrations of the stirrup bone directly cause:

What is the 'temporal lobe's' relationship to the ear structure?

Why does the human ear lose the ability to hear high-frequency sounds first as a result of aging (Presbycusis)?

How does the 'Stria Vascularis' contribute to the function of the inner ear?

Which of these is NOT a method to produce vibration for sound?

To produce sound from a violin, the bow is rubbed against the strings to cause:

In a whistle, sound is produced by the vibration of:

The pitch of sound produced by a vibrating object depends on its:

If you increase the force with which you strike a drum, you are increasing the sound's:

Which property of a vibrating string can be changed to alter the pitch of the sound produced?

The maximum displacement of a vibrating body from its mean position is called its:

If the time period of a vibrating body is $0.02$ s, what is the frequency, and what is the nature of the sound?

A simple pendulum is oscillating at a frequency of 2 Hz. Does it produce audible sound?

In a 'Santoor', sound is produced by:

Which of these factors does NOT affect the speed of sound in a gas?

Sound waves consist of alternating:

Which property of sound changes when a person shouts compared to when they whisper?

A vibrating object moving forward creates a region of high pressure in front of it. This is a:

The wave property that does not change when sound travels from one medium to another is:

Which of the following factors does NOT affect the speed of sound in a gas?

Compressions are regions of:

A wave is represented by $y = 0.5 \sin(10\pi t - 0.1\pi x)$. What is the velocity of the wave if $x$ is in meters and $t$ is in seconds?

If the density of a certain gas at constant temperature is doubled, the speed of sound in that gas will:

At what temperature will the speed of sound in air be double its value at $0^{\circ}C$?

A sound wave is a _________ wave.

In which state of matter is the speed of sound generally the lowest?

The working of the human ear involves converting sound energy into:

The 'quality' of sound is also known as:

A student strikes one end of a very long steel pipe with a hammer. Another student at the other end, with their ear pressed against the pipe, hears two distinct sounds at slightly different time intervals. Which of the following statements correctly explains this observation?

The sound of a thunderclap is heard after the flash of lightning is seen because:

A boy hears a thunderclap $5\text{ seconds}$ after seeing the lightning. If the speed of sound is $344\text{ m/s}$, how far is the lightning from the boy?

In the human ear, the three bones (Hammer, Anvil, Stirrup) are located in the:

A longitudinal wave is characterized by:

What happens to the speed of sound as we move from solid to gaseous state at a constant temperature?

Sound energy is a type of:

The function of the middle ear is to:

When a sound wave is reflected, the angle of incidence is:

The auditory nerve sends signals to the:

When a sound wave travels through a medium such as air, the energy it carries gradually decreases over a distance. Based on the flow of energy shown in the diagram, what is the primary scientific reason for this dissipation?

Sound waves cannot travel through ________.

When we shout in front of a high mountain, we hear the same sound again after some time. This phenomenon is called ________.

If the energy of a sound wave is reduced to $1/100$th of its original value, the amplitude of the wave reduces to:

When sound energy is absorbed by a medium, the temperature of the medium:

A sound wave has a power of $0.001\,W$. If it is distributed over a sphere of surface area $10\,m^2$, the intensity is:

Sound waves in air are characterized by changes in:

A wave with a frequency of $2 Hz$ completes how many oscillations in $10$ seconds?

The pitch of a sound is determined by the _____ of the vibration.

If the wavelength of a wave decreases while the speed stays the same, the frequency must:

A sound wave graph shows one full cycle covering $0.005\text{ seconds}$. What is the frequency?

In a graphical representation, the 'mean position' line represents the density of the medium when:

What happens to the frequency of a sound wave if its time period is doubled?

Which of the following would change the distance between two consecutive crests on a displacement-distance graph of sound in a specific medium?

A graph represents a sound wave with a frequency of $250\text{ Hz}$. What is the time interval between a compression and the immediate next rarefaction?

If the x-axis of a sound wave graph represents 'Distance' and the distance between a crest and the next trough is $d$, what is the distance between two consecutive troughs?

In a sound wave, the change in density from a maximum value to a minimum value and again to the maximum value makes one complete:

If the time period of a wave is 0.05 seconds, its frequency is:

The velocity of sound in a medium depends on:

Sound waves with frequencies below 20 Hz are called:

Two sound waves, $P$ and $Q$, are traveling through the same medium. The diagram below represents the number of vibrations they complete in the same time interval. If the maximum displacement of the particles in wave $P$ is twice that of wave $Q$, which of the following is a correct comparison?

In a longitudinal sound wave, the time interval between a point of maximum compression and the immediate next point of maximum rarefaction is observed to be $0.002 \text{ s}$. What is the frequency of this sound wave?

A ship sends out ultrasound that returns from the seabed and is detected after $3.42 \text{ s}$. If the speed of ultrasound through seawater is $1531 \text{ m/s}$, what is the distance of the seabed from the ship?

A sound wave of frequency $500 \text{ Hz}$ has a velocity of $350 \text{ m/s}$ in a medium. The distance between two particles having a phase difference of $60^{\circ}$ is:

If the speed of a sound wave is $v$, and the frequency is $f$, what is the distance between the $1^{\text{st}}$ and the $4^{\text{th}}$ rarefaction?

In which medium does sound travel the fastest at a given temperature?

Which of the following is used to detect cracks and flaws in metal blocks by using sound reflection?

The sound reflected from a distant mountain is called an echo. To hear it, the time gap between original and reflected sound must be:

If a sound wave travels from air to a solid wall, most of it is:

The working of a hearing aid is based on ________ of sound.

The ceilings of large auditoriums and concert halls are designed with a specific curved shape, as illustrated in the diagram. Which of the following best explains the functional advantage of this design?

In the experimental setup to verify the laws of reflection of sound, a vertical partition is placed between the source of sound and the listener, as shown in the diagram. What is the primary purpose of this partition?

In the experiment to verify the laws of reflection of sound, the tubes used should be:

A ship sends an ultrasound pulse down to the sea floor. The pulse is reflected and received $2.0\text{ s}$ later. If the speed of sound in water is $1500\text{ m/s}$, what is the distance traveled by the pulse?

If $v$ is the speed of sound, $d$ is the distance to the obstacle, and $t$ is the time taken for the echo to return, the correct relationship is:

Ultrasound has a frequency range of:

The property of sound used in the working of SONAR is:

Which of the following is used to monitor the growth of a fetus during pregnancy?

Infrasound is produced by:

The time taken by an ultrasonic pulse to go from the ship to the seabed and back is $4\text{ s}$. If the speed of sound in water is $1500\text{ m/s}$, the depth of the sea is: