Two sounds, A and B, have the same amplitudes and waveforms but have different frequencies of f and 2f. Then B becomes strident, and A becomes solemn.
The waveforms of two sounds of the same loudness and pitch generated by two different instruments differ.
The loudness of a sound wave falls when its amplitude is lowered.
Music is regular, smooth, and enjoyable to listen to.Noise is abrasive, dissonant, and unpleasant to listen to.The volume of the music is low (between 10 dB to 30 dB)The volume ...
A noise's wave pattern is irregular, whereas music's wave pattern is regular. The waveforms of music and noise are depicted in the diagram below.
(i) Because the loudest sound has the highest amplitude, Figure (b) is attributable to it. (ii) Because frequency is the lowest, figure (a) is due to the sound with the lowest pitch.
(i)The amplitude and waveform of A and B are identical. As a result, both the volume and the quality are the same. (ii) The amplitude and waveform in figures B and C are not the same. As a result,...
(i)A musical instrument note is depicted in Figure IV. (ii) A faint (or feeble) note is shown in Figure I. (iii) A bass (or low frequency) note is shown in Figure 2.
(i) Loudness is a property of a sound that is impacted by a big amplitude. (ii) Quality is a property of a sound that has been altered by a large in its waveform. (iii) Pitch is a property of sound...
(i)The pitch of a note is determined by its frequency. (ii) The loudness of a sound is determined by its amplitude. (iii) Waveforms define the note's quality.
The timbre, or quality, of a sound is the feature that allows us to recognize a person by his voice even when we are unable to see him.
Subsidiary notes are produced by many instruments. A note played on one instrument has many subsidiary notes, but a note played on another instrument has only a few subsidiary notes. As a result,...
Because the guitars are same, their waveforms will be comparable, and so their quality will be similar.
Because of their varied waveforms, two sounds of the same loudness and pitch generated by different instruments sound different. Along with the main note, the waveforms are determined by the number...
The quality or timbre of the sound is the feature that allows one to identify the sound of two musical instruments even if they are of the same pitch and volume.
(a) R has the greatest amplitude. As a result, R will make a louder sound. (b) P has the highest frequency. As a result, P will generate the most shrillness. (c) The wavelength ratio of the...
(a) As the frequency of a sound increases, so does its pitch. (b) If the sound's amplitude is half, the intensity is reduced by one-fourth.
The trumpet has the highest frequency. The trumpet, therefore, has the greatest pitch.
As the water level in a bottle held under a water faucet rises, the length of the air column reduces. As a result, the frequency of sound generated rises. As a result, hearing sound from a distance...
The diagram for a high-pitched note is as follows: The diagram for a low-pitched note is as follows:
Pitch is the feature that distinguishes two sounds of equal volume but different frequency produced by the same instrument.
Pitch is the perceived quality of sound that is proportional to its frequency.
The frequency of a note determines its pitch. When the vibrations of two notes with the same amplitude heard on the same instrument are of different frequencies, their pitch will differ.
Noise pollution is the disruption caused by unwelcome loud and unpleasant sound with a decibel level greater than 120 dB coming from different sources in the surroundings, such as a loudspeaker,...
The safe sound level for our ears is up to 120 decibels.
The decibel is the unit used to measure sound levels.
Larger bells, according to bell research, have a lower resonance frequency. For a sound wave to travel great distances, the frequency of the sound must be lower. It's also been noticed that the...
The following elements influence the loudness of sound heard by a listener: (i) The square of the amplitude determines the loudness. (ii) Loudness is inversely proportional to distance squared....
The quantity of sound energy travelling per second typically across a unit area at a point of the medium is the intensity of a sound wave at that location. The intensity of a sound, or the energy...
The formula for the relationship between loudness L and intensity I is \(L=K{{\log }_{10}}I\) where K is the proportionality constant
The quantity of sound energy travelling per second typically across a unit area at a point of the medium is the intensity of the sound wave at that location. The sound wave's strength is measured in...
Because the board covers such a vast surface and causes a large volume of air to vibrate, the sound energy reaching our ears is increased.
The decibel scale is used to measure the loudness of sound.
The wave pattern of a loud note differ from the soft note in many aspects.
(i) The square of the amplitude determines the loudness. The loudness ratio is 1:9. (ii) If the pitch remains constant, the frequency remains constant. 1: 1 ratio of frequencies
Because the square of the amplitude is exactly related to the loudness of sound. When the wave's amplitude is doubled, the sound becomes four times louder.
(a) The loudness of a sound wave is determined by its amplitude. A loud sound has a higher amplitude, while a quiet sound has a lesser amplitude. (b) The amplitude is proportional to the square of...
Sound has three distinct properties. (i)Distinction (ii) shrillness or pitch (iii) Timber quality
A tuning fork with a 256 Hz frequency will resonate with another tuning fork with a 256 Hz frequency.
The vibrations of a body are forced vibrations when it vibrates under a periodic force.
Between the two fixed supports, a wire is stretched, plucked exactly in the centre, and then released. It works with natural vibrations
To tune a radio receiver, we simply change the settings of the electrical components such that vibrations of the same frequency as the radio waves we wish to receive are produced. Due to resonance,...
The sound box is designed such that the air column inside it has the same natural frequency as the string stretched on it, so that when the strings vibrate, the air column inside the box is forced...
While the troops march in formation, all of their individual periodic forces are in phase, causing forced vibrations of a certain frequency to be created in the bridge. If the bridge's natural...
(a) The tubes A and C produce no loud sound, while the tube B produces a loud sound. (b) The frequency of the air column in tube D is the same as the tuning fork's frequency. Tube B has a resonance...
Resonance is the phenomenon that causes a loud audible sound when a vibrating tuning fork is held over an air column of a specific length with one end. The vibrating tuning fork causes forced...
Set the pendulum A into oscillation by moving it to one side, normal to its length. It is noticed that pendulum D begins vibrating with a tiny amplitude and eventually attains the same amplitude as...
The vibrating tuning fork A produces forced vibrations in the air column of its soundbox. The vibrations in the soundbox have a significant amplitude due to the huge surface area of air in the...
At resonance, the body vibrates with a significant amplitude, releasing a substantial quantity of energy into the medium. A loud sound is heard, which conveys greater energy to the ear.
The forced vibrations have a limited amplitude.The resonant vibrations have a considerable amplitude.In forced vibrations body's vibrations are out of sync with the external periodic force.The...
Resonance is a type of forced vibration in which the driving force's frequency is the same as the natural frequency of the driven body.
Resonance prerequisites: The phenomenon known as resonance happens when an applied force induces forced vibration in the body and the frequency of the applied force is exactly identical to the...
When the frequency of an externally imposed periodic force on a body equals its natural frequency, the body begins to vibrate with greater amplitude. This phenomena is referred to as'resonance,' and...
(i) When a body is pushed from its equilibrium position and released, free vibrations occur, whereas forced vibrations are caused by an external periodic force of any frequency. (ii) In free...
When the stem of a vibrating tuning fork is put on the top of a table, it causes forced vibrations in the tabletop. When the frequency of a periodic force applied to a body equals the inherent...
The vibrations of a body that occur under the influence of an external periodic force operating on it are known as forced vibrations. When a musician plays the guitar, he pushes the strings to...
Below is a displacement time graph of damped vibrations. un
In the air, a tuning fork produces damped vibrations.
(i) Vibrations that have been dampened(ii) Example: When a tuning fork is stroked on a rubber pad, it produces damped air vibrations.(iii) The frictional force reduces the amplitude of vibrations....
The periodic vibrations of a body with diminishing amplitude in the presence of a resistive force are known as damped vibrations. When a body is forced to vibrate in a medium, the amplitude of the...
Because the surrounding medium resists motion, the energy of the vibrating body progressively declines, resulting in a steady decrease in the amplitude of vibration.
The frequency of blade vibrations can be reduced by extending the blade's length or by placing a tiny weight on the blade's free end.
On a stringed instrument, variable thickness strings are used to generate different frequency sound waves. This is because a stretched string's inherent frequency of vibration is inversely...
(a) A diagram depicting the main note is (i) (b) A diagram with four times the frequency of the first is shown (iii) The diagram with the longest wavelength is shown in (c) (i) (d) The frequency of...
We may get the required frequency by changing the tension. As a result, a stringed instrument has the ability to alter the tension of the string.
(a) String length: Sound frequency is inversely related to string length. (b) Tension: The square root of the tension in the string is exactly related to the frequency of sound.
There are two methods for raising the frequency of a stretched string's vibrations (i) By raising the string's tension. (ii) By reducing the string's length.
The frequency of the note generated in the air column can be enhanced by shortening the air column.
(a) The length of an air column is affected by the frequency of sound released owing to vibration in the air column. (b) As the length of the air column grows longer, the frequency drops. As a...
Because the existence of medium around the body provides some resistance, the amplitude of vibration diminishes with time and does not remain constant. As a result, a body's inherent vibrations can...
The displacement time graph for free vibrations for a body performing free vibrations is presented below. When the oscillations of a body are placed into vibrations by any external force and then...
When any body capable of vibrating is set to vibrate freely at a frequency of f, the natural frequency of vibration of the body happens. The inherent frequency vibration of a body is determined by...
The vibrations of a body in the absence of any external force are known as natural or free vibrations. Consider the following scenario: When we strike the keys of a piano, several strings are placed...
The largest deviation from the mean position is called amplitude. The maximum displacement for A is 10 cm, and The maximum displacement for B is 5 cm. A1 / A2 = 10 / 5 = 2 / 1 = 2: 1 is the greatest...
(velocity / time) / 2 = depth of the sea \(1400\times1.5\) / 2 = 1050 meters
Two of the fired rounds are heard by person B; the first is straight from the gun, while the second is reflected from the cliff. Given a sound speed of 320 m/s The time it takes for sound to travel...
The first cliff's distance from the guy, 2\(\times \)D1 = velocity\(\times \)time D1 = (320 \(\times \)4) / 2 D1 is equal to 640 metres. D2 = (320 \(\times \) 6) / 2 is the distance between the...
We know that, The pendulum vibrates 5 times each second. As a result, for 8 vibrations, the time is 8 / 5 seconds. similarly 2 D / time = Velocity 2 D / 1.6 = 340 This implies that...
We know that, \(2D=velocity\times time\) Therfore, \(D=\frac{1450\times 4}{2}\) D = 2.9 kilometres
2 D / Time = Velocity 2D / velocity = time after which an echo is heard = \(\frac{2\times 48}{320}\) =0.3 seconds
Given RADAR's sound transmission speed is \(3\times {{10}^{8}}\)m/ s. The signal's transmission distance = 300 km = 300000 meters The signal travels twice, thus the distance is computed twice when...
(a) Velocity = Time / 2D so, time= \(\frac{2\times 25}{350}\) Hence, Time = 0.143 seconds (b) The reflected sound arrives at the guy 0.1 second after the initial sound, while the original sound...
We know that 2D / Time = Velocity 2 D / 0.1 = 1400 D\(=\frac{1400\times 0.1}{2}\) D = 70 metres
We are aware of this. 2D / 0.1 = Velocity D \(=\frac{350\times 0.1}{2}\) Hence, D = 17.5m
(i)The frequency or number of waves produced per second = wavelength / velocity =\(\frac{24}{20}\times {{10}^{-2}}\) =120 (ii) Time it takes for one wave to form = 1 / frequency = 1/120 =...
Bats generate (b) ultrasonic waves to identify impediments in their route
In air, the minimum distance between the source and the reflector for an echo to be heard is around (b) 17 m.
The echo technique using ultrasonic waves is used in medical science to image human organs such as the liver, gall bladder, uterus, and womb. Ultrasonography is the term for this procedure....
SONAR stands for sound navigation and ranging. Ultrasonic waves are released into the ocean from the ship in all directions. These waves are reflected back from the barrier, such as an iceberg or a...
Ultrasonic waves are utilized for sound range. The frequency of these ultrasonic waves exceeds 20,000 Hz, while the human ear's audibility range is 20 Hz to 20,000 Hz.
Sound ranging is the process of using echo to identify barriers. Sound range is used by bats and dolphins to detect their prey.
Bats can create and perceive ultra-high-frequency sounds up to roughly 100 kHz. Bats' sound is reflected back to them by a barrier in front of them as they fly. They can tell where the obstacles are...
Bats make noise, which is reflected back to them by an obstruction. They can locate the barrier by hearing the echo and fly around it securely without hitting with it. Dolphins identify their...
To hear an echo, the sound must travel from the source to the reflector and then back from the reflector to the source. If d is the distance between the source and the reflector, then 2d is the...
The uses of echo are numerous. (i) Because dolphins can't see with their eyes, they utilize echolocation to find their way around. They can tell whether there is an item in front of them by...
The duration of time it takes to hear the echo is t = 2d / v t = (2 × 12) / 340 t = 24 / 340 < 0.1 seconds The man will not hear the echo because the feeling of a sound lasts around 0.1 second in...
The sound heard following reflection off a distant obstacle (such as a cliff, a hillside, a building wall, etc.) after the initial sound has stopped is termed an echo. There are two requirements...
The return of a sound wave in the same medium after impacting a surface such as a wall, metal sheet, or plywood is known as reflection of the sound wave. The sole need for a sound wave to be...
Difference between Waves of light and sound are Electromagnetic waves are light waves.Mechanical waves are sound waves.They have the ability to travel in a vacuum.For proliferation, they require a...
The elasticity and density of the medium through which sound travels determine its speed. In liquids, sound travels faster than in gases, and in solids, sound travels faster than in liquids. Sound...
(i) The wavelength (or speed) of a wave varies when it travels from one medium to another. (ii) The frequency of a wave travelling in one media does not change as it travels through another medium.
(a)The amplitude of a wave is the distance between its resting position and its greatest movement. (b) Frequency is the number of waves travelling by a given location per second. (c) The wavelength...
Mechanical waves are waves that transmit energy through a material medium