When do things make sounds?

When do things make sounds?

Sounds about something when

shaking

As the thing emanating from the sound vibrates “i.e. the sound source vibrates”, then it collides with the air molecules around it to collide with the air molecules nearby, resulting in a wave of vibrations that travels in the air to the ear in the form of sound, and it is worth noting that these sound waves stop It depends on several things, including the medium through which it travels, as well as the strength of the vibrations.

And if we come to define sound, it can be described as a vibration that travels through a specific medium, including the medium of gas, liquid or solid substances in the form of a group of sound waves, as it occurs as a result of the vibration of something, for example the vocal cords produce sounds as a result of their vibration, so that the sound travels on Waves form to the outer ear and reach the inner ear through the eardrum, then the sound is clearly heard.

What does pitch mean?

It is what distinguishes one sound from another.

The pitch of the sound is directly proportional to the frequency of the sound. The higher the sounds, the lower their frequency. But if the sounds are sharp, their frequency is high, i.e. the more intense the sound, the higher its frequency.

The difference between the intensity of the sound and the pitch of the sound

The intensity of the sound and the pitch of the sound differ in meaning, as the pitch of the sound means the difference between one sound and another.

Some people may get confused, but the intensity of the sound and the degree of sound differ in meaning, as the degree of sound means the difference between one sound and another, for example, thick sounds such as men’s voices, which have low frequencies, and sharp sounds such as women’s voice with a high frequency, as this depends on the frequency of the sound , while the intensity of sound means the energy of sound waves, i.e. the difference between loud sounds and low sounds, where the sound intensity is affected by the distance of the source from which the sound originates, and the quality of the medium passing through it.

Sound is created by vibration and transmitted in waves through:

air.

Air is made up of very small particles and as soon as an object vibrates, the vibrations are transmitted in waves through the air particles, thus the air particles also vibrate to produce the sound audible by the eardrum.

Sound is a wave

longitudinal mechanical

The medium through which the air travels may be varied between solid, liquid or gaseous medium, where sound waves are classified as longitudinal mechanical waves, since the waves pass through a physical medium and this medium is “air, water, solid things”, so the transmitted mechanical wave is known Through any of the mediums in the name of sound.

How fast does sound travel through the air?

332 meters per second.

The speed of sound is approximately 332 meters per second, and despite its speed, its speed with light is greater and reaches 300,000 kilometers per second, which means that the sound takes a long time to travel through the air, for example when we see lightning in the sky we can hear thunder after A few simple seconds.

It is also worth noting that sound waves can travel through liquid materials such as water and others, at a very fast speed, exceeding the speed of sound in air, while its transmission through solid materials is more effective.

Types of sound waves

• longitudinal sound waves
• Mechanical sound waves.
• Acoustic pressure waves.

Sound waves are as varied as other types of sound waves, and the following group represents the three types of sound waves:

Longitudinal sound waves:

A longitudinal wave is defined as a wave in which the direction of energy transfer is parallel to the movement of the particles of the medium, for example when moving rubber back and forth, the rubber will move parallelly back and forth, and sound also moves when knocking on a tuning fork, so sound waves move parallel to air particles.

Mechanical sound waves: 

As we mentioned above, sound waves travel through the air, through the vibrations of molecules, which lead to the transmission of vibrations to the neighboring molecules, and it remains so in a sequence until the particles displace each other by what is known as mechanical vibrations and transforming air molecules into particles, as well as Mechanical vibrations into mechanical sound waves.

Acoustic pressure waves:

 Sound waves are known as pressure waves because they consist of various pressure zones between low and high pressure.

The importance and uses of sound waves

• Telecommunications.
• Ocean exploration.
• subterranean resources.
• the hunt.

Communication:

 The importance of sound and sound waves is due to their use in the most famous means of communication, which is communication, where sound travels in the air to the eardrum, as well as some other technologies that depend on sound, including radios and televisions.

Ocean exploration:

By using sonar devices, the oceans are explored, as these devices rely on sound waves, so that the sound waves bounce back when they hit something, from which researchers can locate objects, especially ships using sonar to find out the location of enemy submarines.

Underground resources:

Geologists also search for sources of oil and other derivatives underground by means of sound waves, because sound waves bounce back and then locate and know the location of the oil underground.

Hunting:

 Sound waves help some creatures in search of food sources, including bats, where the bat uses a type of sonar to detect new prey, by emitting some sound waves to bounce back and locate the prey easily, and dolphins also come among the marine creatures that use waves The sound is to know its exact location, and to search for its prey, in addition to that the sound is a means of communication between the members of the group.

sound characteristics

• amplitude.
• wave length.
• sound frequency.
• sound reflection.
• sound refraction.

Amplitude:

The amplitude of the sound is proportional to the energy. The greater the amplitude, the greater the energy in the sound. What is meant by amplitude here is the extent of pressure and the space through which the sound travels in the middle, so if the amplitude is high, the sound is loud.

Wavelength:

 The wavelength of sound is the distance between two successive peaks of sound waves. Sound waves consist of places of high pressure and other places of low pressure, and areas of high pressure appear in the form of a high peak.

Sound frequency:

Sound frequency refers to the vibrations of sound in the air or the medium it travels through, and the sound frequency is calculated depending on the wavelength of the sound as well, to arrive at its speed in the air, through the following equation: Speed ​​of sound = frequency x wavelength.

Reflection of sound waves:

 The echo of sound occurs as a result of its refraction, and it is similar to the principle of light reflection where the angle of incidence is equal to the angle of reflection, and this feature is also used in voice navigation technology, to communicate easily under water depths.

Refraction of sound:

 The refraction of sound is similar to that of light, where the light is refracted when the density of the medium through which the light travels changes, as well as the sound as it is refracted as soon as the density of the envelope or the medium it travels through changes.