Sound waves do carry mass. Using a theoretical approach called effective field theory, which is commonly used in particle and solid-state physics, the team calculated the mass carried by a sound wave packet propagating though a superfluid.

Sound waves move by vibrating objects and these objects vibrate other surrounding objects, carrying the sound along. The further away from the original source of a sound you are, the waves lessen until they don’t have the strength to vibrate any other particles.

Sound waves are longitudinal waves. They need a medium to travel through. When travelling through air, the speed of sound is about 330 metres per second (m/s). Sound cannot travel through a vacuum because there are no particles to carry the vibrations.

b. TRUE – Absolutely! Particles do not move from the source to the ear. Particles vibrate about a position; one particle impinges on its neighboring particle, setting it in vibrational motion about its own equilibrium position.

Sound is what we hear. Noise is unwanted sound.

vacuum

Sound waves are travelling vibrations of particles in media such as air, water or metal. So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate.

Ans. Sound is produced due to the to and fro or back and forth motion of an object known as vibration. When a tightly stretched band is plucked, it produces sound.

air column

Sound is produced when an object vibrates, creating a pressure wave. This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. As the particles vibrate, they move nearby particles, transmitting the sound further through the medium.

The vocal folds (vocal cords) are attached within the larynx to the largest of the laryngeal cartilages known as the thyroid cartilage or “Adam’s apple”. The vocal folds produce sound when they come together and then vibrate as air passes through them during exhalation of air from the lungs.

All sounds originate in the vibrations of material objects. The source of all sound waves is vibration. In a piano, violin, or guitar, a sound wave is produced by vibrating strings. In a saxophone, a reed vibrates; in a flute, a fluttering column of air at the mouthpiece vibrates.

Examples of Sound Produced by Vibration of Objects In guitar when they pluck the strings of a guitar, it vibrates and produces sound. The sound produced by it travels through the air which acts as the medium. The sound produced is transmitted through pressure waves within the object.

Acoustic instruments, Electrical instruments, Living beings like animals and birds using their vocal cords, Man-made sources like machines, any vibration caused by wind are five sources of sound.

In guitar when we pluck the string of a guitar, it vibrates and produces sound . The sound produced by it travels through the air which act as a medium . Another example of producing sound is tuning fork .

The three ways are :

• By vibrating membranes.
• by vibrating strings.
• by vibrating plates.
• by vibrating air columns.

Know your decibels! Ten of the loudest sounds out there

• 230 dB – Sperm whale.
• 180 dB – Rocket launch.
• 120 dB – Fireworks.
• 110 dB – Live gig.
• 100 dB – Night club.
• 97 dB – Fire alarm.
• 94 dB – Lawnmower.
• 88 dB – Heavy traffic.

If an object vibrates quickly, we hear a high- pitched sound. An example of a high-pitched sound is a whistle. The more decibels, the louder the sound. A soft sound, like a whisper, measures around 15 to 20 decibels.

Loud sound has a high volume while soft sound has a low volume. Banging of a hammer and a car’s horn are examples of loud sounds while playing of a piano and sound of blowing wind are examples of soft sounds.

quiet and pleasant

Loud and soft sounds have a few differences. One is that a loud sound has more energy then a soft sound. The more a surface vibrates the louder the sound is.

Sound is produced by vibrating bodies. If energy is supplied is less to an object, then object vibrates with a feeble sound or soft sound. on the other hand, if energy supplied to an object is more than the object vibrates more with greater amplitude and produces louder sound.

The sound an object makes changes depending on how fast it is vibrating. When an object vibrates quickly, high-pitched sounds are heard. Low-pitched sounds come from things that vibrate more slowly. Humans can hear sounds of different pitches, but there are sounds that they cannot hear.

Intensity results from two factors: the amplitude of the sound waves and how far they have traveled from the source of the sound. It depends on the amount of energy that started the waves. Greater amplitude waves have more energy and greater intensity, so they sound louder.

DYNAMICS

The Definition of Quiet in Music Terms The musical term for playing quietly or softly is called piano. It was originally called the ‘pianoforte’ as it could play both quiet and loud (forte is the musical term for loud).

mezzo-forte

Dynamic markings. The two basic dynamic indications in music are: p or piano, meaning “quiet”. f or forte, meaning “loud or strong”.