What is the relationship between frequency and sound?
The sensation of a frequency is commonly referred to as the pitch of a sound. A high pitch sound corresponds to a high frequency sound wave and a low pitch sound corresponds to a low frequency sound wave.
Which characteristic of musical sound is different in these two waves?
Pitch distinguishes two sounds of the same loudness and timbre. The sensation of a frequency is commonly referred to as pitch.
Can light travel in a vacuum?
Light travels in waves, and, like sound, can be slowed depending on what it is traveling through. Nothing can outpace light in a vacuum. However, if a region contains any matter, even dust, light can bend when it comes in contact with the particles, which results in a decrease in speed.
What happens to the loudness of a sound if its amplitude decreases?
On decreasing the amplitude of the sound wave, its loudness gets decreased. We know that the intensity of a wave is directly proportional to the square of its amplitude. As a result, on decreasing the amplitude of a wave, its intensity gets decreased.
How does sound travel through the ear?
Sound waves entering the ear travel through the external auditory canal before striking the eardrum and causing it to vibrate. The eardrum is connected to the malleus, one of three small bones of the middle ear. Also called the hammer, it transmits sound vibrations to the incus, which passes them to the stapes.
Do sound waves travel faster in air or water?
While sound moves at a much faster speed in the water than in air , the distance that sound waves travel is primarily dependent upon ocean temperature and pressure.
How is loudness related to the distance between the listener and the source?
The loudness of sound is directly proportional to the density of the medium through which it propagates. b) Lesser the distance between the source and the receiver, louder is the sound heard by the listener. Thus, closer the source of sound, louder is the sound heard.
How does sound from a sound producing body travel through air to reach our ears illustrate your answer with the help of a Labelled diagram?
b) Sound from a sound producing body travel through air to reach our ears is explained with the help of a tuning fork. These waves are longitudinal and move in the same direction as the movement of the sound. This is how the sound reaches to our ears.
What will happen to the loudness of the sound if the distance between the source and the observer is doubled?
when the distance between the source and the observer is doubled then the loudness of the sound decreases with the distance.
What is the two different aspects of sound?
Sound is characterised by two aspects: a physical and a sensory aspect. In terms of physics sound is produced by a source that is caused to vibrate. This vibration results in variations in air pressure. The sound spreads through the air as waves.
How does sound reach our ears from the source of its production?
Sound reaches our ears in the form of transverse waves or vibrations from its source of production. Sound travels by itself mostly through its medium of transportation but at times sound is produced by force and these sound vibrations are called forced vibrations.
Does loudness depend on frequency?
The loudness of sound depends upon (1) Its velocity(2) Its amplitude(3) Its pitch(4) Its frequency. The loudness of sound is directly proportional to the amplitude of the wave.
What is the difference between reverb and echo?
Reverberation is the persistence of sound after the sound source has been stopped. It results from a large number of reflected waves which can be perceived by the brain as a continuous sound. On the other hand, an echo occurs when a pulse of sound can be heard twice.
What happens when sound hits a surface?
When a sound wave hit a particular surface, the kinetic energy driving it is converted into a small amount of heat energy which dissipates, leeching power from the sound wave and causing it to decaying faster.
Can you prove that experimentally sound does not travel in a vacuum?
The experiment is done by placing an electrical bell in the bell jar. As the air is pumped out of the sealed bell jar, the sound from the bell jar fades. However, the sound is not audible to our ears because of the vacuum inside the jar. This demonstrates that the sound wave cannot travel through vacuum.
What factors does the loudness of sound depend on?
Answer: The loudness of sound is a phenomenon of a sound depending on the amplitude of the sound wave. If the amplitude of the sound wave is large, then the sound is said to be loud. The loudness of sound is directly proportional to the square of the amplitude of vibration and it is expressed in decibel (dB).
Which is a good sound absorber?
In general, soft, pliable, or porous materials (like cloths) serve as good acoustic insulators – absorbing most sound, whereas dense, hard, impenetrable materials (such as metals) reflect most. How well a room absorbs sound is quantified by the effective absorption area of the walls, also named total absorption area.
Can you hear sound in space?
Space Environment So, in order for sound to travel, there has to be something with molecules for it to travel through. On Earth, sound travels to your ears by vibrating air molecules. In deep space, the large empty areas between stars and planets, there are no molecules to vibrate. There is no sound there.
What happens when you increase the amplitude of a sound?
The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases. As the amplitude of the sound wave increases, the intensity of the sound increases. Sounds with higher intensities are perceived to be louder. Relative sound intensities are often given in units named decibels (dB).
What happens to loudness when amplitude is doubled?
Loudness of sound is directly proportional to the square of the amplitude. When amplitude is doubled, loudness becomes 4 times.
How does loudness of sound depend on amplitude if the amplitude is tripled by how much does loudness increase?
Loudness of sound is proportional to the square of amplitude. If the amplitude is tripled, the loudness increases by nine times.
Which characteristic enables us to differentiate between a sitar and flute?
Answer: The tone of the sound will distinguish between the ‘notes’ (musical sounds) played on a flute and a sitar (both the notes having the same pitch and loudness).
How does sound travel through the air?
When a drum is hit, the air particles next to the drum skin vibrate and collide with other particles, and this vibration is then transmitted through the air. This is known as wave compression, which allows sound to travel quickly through the air.
Does sound travel if there is no medium?
Sound needs a material medium for their propagation like solid, liquid or gas to travel because the molecules of solid, liquid and gases carry sound waves from one point to another. Sound cannot progress through the vacuum because the vacuum has no molecules which can vibrate and carry the sound waves.
What determines the pitch of a sound?
The number of vibrations per second or frequency determines the pitch of a sound. Frequency is directly proportional to pitch. Higher the frequency, higher the pitch.
How does loudness of sound is affected by amplitude?
Amplitude is a measure of the size of sound waves. It depends on the amount of energy that started the waves. Greater amplitude waves have more energy and greater intensity, so they sound louder. The same amount of energy is spread over a greater area, so the intensity and loudness of the sound is less.
What 2 factors affect the loudness of a sound?
What two factors affect the loudness of a sound? The amount of energy it takes to make the sound, and the distance from the source of the sound.
How do a vacuum affect sound?
Sound does not travel at all in space. The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound. Radio is a form of electromagnetic radiation just like light and can therefore travel through the vacuum of space just fine.