Characteristics and Characteristics of Sound Waves
Sound Wave Papers: Characteristics, Properties, Sources, Examples, Theory, Frequency and Speed of Sound Wave Flow
The Meaning of Sound
Sound is one of the types of waves that the auditory (ear) senses. In physics lessons, the meaning of sound is something that is created from vibrating objects. The thing that produces sound is called a sound source. A vibrating sound source vibrates the molecules into the air around it.
Thus, the condition of the sound is that there is a vibrating object. Sound propagation requires a medium. We can hear a sound if there is a medium that can slow down the sound.
Sound waves
There are several conditions that must be met for a sound to be heard.
Terms and conditions of sound are:
There is a vibrating object (sound source)
There is a medium that slows down the sound, as well
There are receivers that are within the reach of the sound source
Sound has a very limited speed. Sound also takes time to move from one place to another. Quickly the noise of a sound is not too great. The speed of the noise is much smaller than the speed of light. Even now, humans have been able to create planes that can fly several times rather than at the speed of sound.
Sound Speed Rapid Formula
v = s / t
v = speed of sound
(m / s), s = source distance to observer (m), t = time interval (s).
Sound Properties
Sound has certain properties or characteristics. The characteristics of these sound waves are as follows:
It's a longitudinal wave
Could not slow down in the free space
Its velocity is influenced by the density of the medium (medium) of its propagation (solid, liquid, gas). Fastest to medium density.
Can experience resonance and reflection.
Sound can also have resonance.
Sound wave properties
Sound as a wave has properties similar to those of a wave:
Can be reflected (reflection)
Sound can be reflected if the sound hits the surface of hard objects, such as the surface of stone walls, cement, iron, glass and zinc.
Example:
Our voice is heard louder in the cave due to the reflection of sound that hits the cave wall.
Our voices in buildings or music studios that do not use sound absorbers.
Refractible (refraction)
Refraction is a deflection of the wave boundary direction after crossing the boundary plane between two different media.
Example:
At night the sound of lightning sounds louder than the daytime due to the refraction of sound waves.
Can be integrated (interference)
Like light interference, sound interference also requires two coherent sound sources.
Example: Two loudspeakers connected to a signal generator (audio frequency generator) can function as two coherent sound sources.
Can be flexed (diffraction)
Diffraction is the event of flexing sound waves when passing through a narrow gap.
Example: We can hear the sound of people in different and closed rooms, because the sound passes through narrow gaps that sound can pass through.
Bat
The nature of sound reflection is very important for some animals, like bats. Bats can emit sound waves so that by utilizing sound reflection events, bats can avoid barrier walls when flying at night. In addition, the bat can know the prey it will eat.
Detect metal damage
Besides being used to determine the depth of the sea and cave, ultrasonic waves can also be used to detect damage to metals that are in the ground, such as water pipes and others.
When the sound wave pulses hit a damaged metal, the pulses are partly reflected and partly passed on. The reflected pulses occur because of a barrier that has a different density. The pulse reflections are received by the detector, so that damage to the metal can be known.