Meaning of Sound

What is Sound:

Sound is the sensation produced in the organ of the ear by means of the vibratory movements of the bodies, transmitted by an elastic medium such as air. The term sound is of Latin origin sonitus which means "noise", "chirp" or "roar".

In the area of ​​physics, sound is a set of waves that diffuse through different media such as solid, liquid or gas, causing variations in density and pressure. In reference to this point, the speed of sound is a function of the medium where it transmits, for example: in air it travels a distance of 340 meters per second, in water it is 1500 meters per second and, finally, in solids. it is from 2500 meters to 6000 meters per second. Consequently, in solids and liquids sound propagates better and is therefore better perceived.

The characteristics of the sound are: timbre, intensity and duration, which means that a sound can be differentiated from one sound to another. Timbre is the quality that allows us to distinguish different sounds since the sound of a flute is not the same with the sound of a piano, as well as the voice of a man with the voice of a child, and so on; intensity is the amount of acoustic energy that a sound contains and allows us to differentiate if the sound is strong or weak; the duration is the time during which a sound is maintained, therefore, there are long, short, very short sounds, among others.

On the other hand, the instrument used to measure and compare sounds is known as a sound level meter and the results are expressed in decibels (dB). It is extremely important that the sounds we perceive exceed the auditory threshold and not the pain threshold, that is, 140 decibels. Similarly, there are different sounds: treble, bass or medium.

Sound waves propagate in all directions in a straight line, but when they collide with an obstacle, they are reflected, altering its direction. The reflection of sound produces: resonance and echo or rebound, the first is characterized by the fact that an object begins to vibrate due to the influence of others at less than 17 meters, in turn, the second is the repetition of a sound against any hard surface, that is, the echo is heard after the original sound.

In the area of ​​phonetics, sound is the pronunciation of a vowel or consonant. In reference to this point, the sound is determined by the position of the mouth, the expulsion of air and the vibration of the vocal cords.

Likewise, the word sound is present in different contexts, for example: onomatopoeic sounds means the imitation of the sound of a thing in the word that is formed to signify it or, expressions to imitate the sounds of animals, for example: cat " meow ”, dog“ woof ”, etcetera; musical sounds is a musical composition made up of a set of pleasant, expressive sounds, according to the laws of harmony, melody and rhythm.

On the other hand, the human being has created a set of devices in order to create, modify, produce and reproduce sounds, voices, music, as occurs in audiovisual productions. Likewise, man has created the transmission of sound over great distances, for example: sounds from radio and television, as well as, has converted sound into electrical impulses such as: the telephone.

Types of sounds

High-pitched sounds are identified as being of high frequency, ranging from 2,000 to 20,000 Hz, for example: the cymbals of the drums. On the other hand, bass sounds are characterized by being of low frequency, they are between 20 to 250 HZ, for example: a drum, electric bass.

A sound is represented by a wave that rises and falls, therefore, the frequency is the measurement that is used to demonstrate the amount of loins of a sound wave that is produced in each second.

However, medium sounds range from 250 to 2000 HZ such as: human voices, guitar, and most instruments.

Sound and noise

The word noise identifies unpleasant, loud and unwanted sounds. Similarly, the term noise can be used to refer to noise pollution, when there is a high intensity sound that is harmful to human health.

In the field of physics, noise is irregular, that is, there is no concordance between the fundamental tones and their harmonics, being comparable with the sound since there is a harmony between the tones and their harmonics.

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