All questions of Sound for Super TET Exam

Electromagnetic waves do not require a medium in order to transport their energy. Mechanical waves are waves that require a medium in order to transport their energy from one location to another. Because mechanical waves rely on particle interaction in order to transport their energy, they cannot travel through regions of space that are void of particles. That is, mechanical waves cannot travel through a vacuum. This feature of mechanical waves is often demonstrated in a Physics class. A ringing bell is placed in a jar and air inside the jar is evacuated. Once air is removed from the jar, the sound of the ringing bell can no longer be heard. The clapper is seen striking the bell; but the sound that it produces cannot be heard because there are no particles inside of the jar to transport the disturbance through the vacuum. Sound is a mechanical wave and cannot travel through a vacuum.

D

Sonar wave

When bats detect ultrasonic waves which after touching the prey comes back to bats ear which tell them how far their prey is and how it looks like. Similarly people detect ultrasonic waves to know the distance. the waves touch the building and comes back which tells us how far it is.
hope it helps you

Because of the reflection of sound waves reflected back through the musical instruments

The children under age 5 years have a fully developed inner and middle ears allowing them to hear from 20 Hz to 25,000 Hz. As the age increases, our inner ear changes gradually which cause reduce in hearing capacity from 20 Hz to 20,000 Hz.

Option B is correct

The motion of the particles of a medium when a sound wave is passing through it is oscillatory because the particles move forward set the neighbouring particle into motion and then come back to it's original position. The particles move to and fro which is also called oscillatory motion.

A sound of single frequency is called a tone. A sound that is produced when several frequencies are mixed is called a note. For example a musical note has tones of various frequencies (sounds of different pitch) and amplitudes (loudness). A note has many component waves in it whereas a tone is represented by a single wave form. 

Because these waves are transverse that means up and down so we'll get crest and trough..

Bcz Sound is pass through the medium(solid,liquid,gas)..... so frequency is does not depend on the medium.

Introduction:
A stethoscope is a medical instrument used by healthcare professionals to listen to the sounds produced by the body. It consists of a diaphragm and a set of tubes that transmit sound from the patient's body to the healthcare provider's ears. The stethoscope utilizes the principle of multiple reflection of sound to amplify and transmit the sounds effectively.

Explanation:
The principle of multiple reflection of sound is based on the fact that sound waves can bounce off surfaces and travel in different directions. This principle is used in the design of the stethoscope to enhance the detection and transmission of sound waves.

How does a stethoscope work?
1. Sound generation: When a patient's body produces sound, such as the beating of the heart or the movement of air in the lungs, the sound waves travel through the body.

2. Diaphragm and tubes: The diaphragm of the stethoscope is placed against the patient's body, allowing the sound waves to enter the instrument. The sound waves then travel through the tubes, which act as conduits for the sound.

3. Reflection of sound: Inside the tubes, the sound waves undergo multiple reflections. These reflections occur when the sound waves encounter the inner surfaces of the tubes. Each reflection helps to amplify the sound waves, making them louder and more distinct.

4. Transmission to the healthcare provider's ears: After the sound waves have undergone multiple reflections, they eventually reach the healthcare provider's ears through the earpieces of the stethoscope. The sound waves are now amplified and easily detectable by the healthcare provider.

Advantages of utilizing the principle of multiple reflection of sound:
- Amplification of sound: The multiple reflections of sound waves within the stethoscope tubes help to amplify the sound, making it easier for healthcare providers to hear and interpret the sounds produced by the body.

- Noise reduction: The design of the stethoscope, utilizing multiple reflections, helps to reduce external noise interference. The reflections of sound waves within the tubes help to isolate and enhance the desired sound signals, while minimizing background noise.

- Improved sound transmission: By utilizing the principle of multiple reflection, the stethoscope ensures efficient transmission of sound waves from the patient's body to the healthcare provider's ears. This helps in accurate diagnosis and monitoring of the patient's condition.

Conclusion:
The stethoscope utilizes the principle of multiple reflection of sound to amplify and transmit the sounds produced by the body. By incorporating this principle into its design, the stethoscope enhances the detection and transmission of sound waves, enabling healthcare providers to accurately diagnose and monitor their patients.

An earthquake produces infrasound before the mainshock wave begins. Infrasound is low-frequency sound less than 20hz.

Here, option C is correct

Ya this is right as we know the speed of sound is more in gas . ..than in liquid and then in solid. ......so this will be correct........

Frequency of a Top's Rotation

Definition of Frequency:
Frequency is defined as the number of oscillations or cycles per unit time.

Calculating Frequency:
To calculate frequency, we use the formula:

frequency = number of cycles/time taken

In this case, the top makes 16 rotations in 0.4 seconds. Therefore, the frequency of the top is:

frequency = 16/0.4 = 40 Hz

Thus, the correct answer is option A, which is 40 Hz.

Option b

Yes, bcoz humans can hear sounds of frequency between 20hz to 20000hz.
1000hz=1khz
20000hz=20khz
Thus the upper limit of the audible range of human hearing is 20khz.

Sonar (originally an acronym for SOund Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels. Two types of technology share the name "sonar": passive sonar is essentially listening for the sound made by vessels; active sonar is emitting pulses of sounds and listening for echoes. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used in air for robot navigation, and SODAR (an upward looking in-air sonar) is used for atmospheric investigations. The term sonar is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low (infrasonic) to extremely high (ultrasonic). The study of underwater sound is known as underwater acoustics or hydroacoustics.

Given:
Frequency of tuning fork (f) = 450 Hz
Velocity of sound in air (v) = 320 m/s

To find:
Wavelength of sound produced by the tuning fork

Formula:
Wavelength (λ) = v/f

Calculation:
Substituting the given values in the formula, we get:
λ = v/f
λ = 320/450
λ = 0.711 m

Therefore, the wavelength of the sound produced by the tuning fork of frequency 450 Hz in air is 0.711 m.

Longitudnal waves travel in the form of compression and rarefactions. In the waves the individual particles of the medium move in a direction parallel to the direction of the propagation of the distirbance. The particles do not move from one place to another but they simply oscillate back and forth about their position of rest. This is exactly how a sound wave propagates. Hence, sound waves are longitudnal waves. 

Difference between low pitched and high pitched sound:

Introduction:
Sound is a form of energy that is produced by vibrations. These vibrations create waves that travel through a medium, such as air or water, and reach our ears. The pitch of a sound refers to how high or low it sounds to our ears.

Frequency:
- High pitched sound: A high pitched sound has a higher frequency than a low pitched sound. Frequency is the number of vibrations or cycles per second. In other words, it is the rate at which the particles of the medium vibrate back and forth.
- Low pitched sound: On the other hand, a low pitched sound has a lower frequency. This means that the particles of the medium vibrate back and forth at a slower rate compared to a high pitched sound.

Amplitude:
- High pitched sound: The amplitude of a sound wave refers to the maximum displacement of particles from their equilibrium position. It determines the loudness or softness of the sound. However, the amplitude does not affect the pitch of the sound.
- Low pitched sound: Similarly, a low pitched sound can have a large or small amplitude, but it does not change the pitch. It only affects the loudness or softness of the sound.

Summary:
In summary, the main difference between a low pitched and high pitched sound is the frequency. A high pitched sound has a higher frequency, while a low pitched sound has a lower frequency. The amplitude, on the other hand, determines the loudness or softness of the sound but does not affect the pitch. It is important to note that frequency and amplitude are independent of each other.

Sounds travel fastest in solid. As steel is the only solid in the options, steel is the correct option.

The correct answer is option 'A' - Rarefaction.




- Longitudinal waves are a type of mechanical wave in which the particles of the medium vibrate parallel to the direction of wave propagation.
- These waves are characterized by compressions and rarefactions.
- Examples of longitudinal waves include sound waves and seismic waves.


- In a longitudinal wave, a compression is a region where the particles of the medium are closer together than their normal or rest position.
- The particles in a compression experience high pressure due to the close proximity to each other.
- This region is characterized by high density and high pressure.


- A crest is a term used in transverse waves, not in longitudinal waves.
- In transverse waves, a crest is the highest point of the wave where the displacement of the particles is maximum.


- Similarly, a trough is also a term used in transverse waves, not in longitudinal waves.
- In transverse waves, a trough is the lowest point of the wave where the displacement of the particles is minimum.


- In a longitudinal wave, a rarefaction is a region where the particles of the medium are farther away from each other than their normal or rest position.
- The particles in a rarefaction experience low pressure due to the increased distance between them.
- This region is characterized by low density and low pressure.
- It is the opposite of a compression.


- In summary, in a longitudinal wave, the part of the wave where the particles of the medium are farther away from each other than their normal position is called a rarefaction.
- Rarefactions are regions of low density and low pressure in the wave.
- Option 'A' - Rarefaction is the correct answer.

In the inner ear, the pressure variations are turned into electrical signals by the cochlea. These electrical signals are sent to the brain via the auditory nerve, and the brain interprets them as sound.

Transfer of Energy in Sound Waves

When a sound wave travels through a medium, the physical quantity that is transferred from one place to another is energy. Sound waves are created by the vibration of particles in a medium, such as air. These vibrations create a disturbance that propagates through the medium, carrying energy with it.

Explanation:

1. Vibration of Particles:
When an object, such as a speaker, vibrates, it causes the particles in the surrounding medium to vibrate as well. These vibrations create areas of compression and rarefaction, leading to the formation of sound waves.

2. Propagation of Waves:
As the particles in the medium vibrate, they transfer their energy to the neighboring particles, causing them to vibrate as well. This transfer of energy continues in a chain reaction, allowing the sound wave to propagate through the medium.

3. Compression and Rarefaction:
As the sound wave propagates, it creates regions of compression and rarefaction. In the compressed regions, the particles are closer together, resulting in higher pressure and density. In the rarefied regions, the particles are spread out, resulting in lower pressure and density.

4. Energy Transfer:
The transfer of energy in sound waves occurs as the vibrating particles pass on their kinetic energy to neighboring particles. As the particles vibrate back and forth, their kinetic energy is transferred to the particles around them, allowing the sound wave to travel through the medium.

5. Perception of Sound:
When a sound wave reaches our ears, it causes the eardrums to vibrate. These vibrations are then transmitted to the inner ear, where they are converted into electrical signals that our brain interprets as sound.

Conclusion:

In conclusion, when a sound wave travels through the air, the physical quantity that is transferred from one place to another is energy. The vibrating particles in the medium transfer their energy to neighboring particles, allowing the sound wave to propagate. This transfer of energy is what enables us to perceive sound.

Sound is not travel inSpace because in space their is no atmosphere. space is a vaccum.

Introduction:
The pitch of a sound refers to its perceived frequency. It is a subjective perception that allows us to differentiate between high and low sounds. The frequency of a sound wave is the number of vibrations or cycles it completes in one second and is measured in Hertz (Hz). The pitch of a sound depends solely on its frequency, and this is what distinguishes a high-pitched sound from a low-pitched sound.

Explanation:
The pitch of a sound can be understood by considering the following points:

1. Frequency:
- The pitch of a sound is directly related to its frequency.
- Frequency refers to the number of vibrations or cycles a sound wave completes in one second.
- When the frequency of a sound wave is high, the pitch is perceived as high, and when the frequency is low, the pitch is perceived as low.

2. Relationship between Frequency and Pitch:
- The relationship between frequency and pitch can be understood by considering musical notes.
- In a musical scale, higher notes are produced by vibrations with higher frequencies, while lower notes are produced by vibrations with lower frequencies.
- For example, the note 'A' above middle C on a piano has a frequency of 440 Hz, while the note 'C' one octave below has a frequency of 261.63 Hz.
- The higher the frequency, the higher the pitch perceived by our ears.

3. Perception of Pitch:
- Our ears are sensitive to a wide range of frequencies, and we perceive different pitches based on the frequency of the sound waves.
- The human audible range typically extends from about 20 Hz to 20,000 Hz.
- Sounds with frequencies below 20 Hz are referred to as infrasound, and those above 20,000 Hz are referred to as ultrasound, which are not audible to humans.

Conclusion:
In conclusion, the pitch of a sound depends solely on its frequency. A high-pitched sound is characterized by a high frequency, while a low-pitched sound is characterized by a low frequency. The relationship between frequency and pitch can be observed in musical notes, where higher notes have higher frequencies and lower notes have lower frequencies. Our ears perceive these frequency differences as differences in pitch, allowing us to differentiate between high and low sounds.

However instead of crests and troughs, longitudinal waves have compressions and rarefactions. A compression is a region in a longitudinal wave where the particles are closest together. A rarefaction is a region in a longitudinal wave where the particles are furthest apart.