Acoustics


 * Speed **

It' s the scalar quantity which is the magnitude of the velocity vector. The SI units for speed are m / s (meters per second).


 * Frequency **

The number of times a specified phenomenon occurs periodicity in a specified interval. In physics is the number of times that a periodic function or vibration repeats itself in a specified time. It is usually measured in hertz. Symbol ν, f.




 * Wavelength **

Is the distance, measured in the direction of propagation, between two points of the same phase in consecutive cycles of a wave. Symbol λ




 * Longitudinal **

Means along the length, running lengthwise, or (by extension) over the course of time. Sound is transmitted through gases, plasma, and liquids as longitudinal waves, also called compression waves. And these longitudinal waves are waves that have the same direction of oscillations or vibrations along or parallel to their direction of travel, which means that the oscillations of the medium (particle) is in the same direction or opposite direction as the motion of the wave.


 * Transverse **

Crossing from side to side; athwart; crossways. A transverse wave is a moving wave that consists of oscillations occurring perpendicular to the direction of energy transfer. If a transverse wave is moving in the positive x-direction, its oscillations are in up and down directions that lie in the y-z plane.



**Sources of sounds ** Sound is caused by the vibration of objects. Big objects make large waves and lower frequency notes. Small objects on the other hand create small waves and there for higher frequency notes. Sound travel quickly by solid objects like the floor, walls or even our body because the particles are nearest one each other and can interact faster than particles dispersed like air. When we clap, we can actually see our hands vibrate, but what we hear is the sound acceleration. When we put our hands together, we force the air out from our hands and it creates a compression wave, which is an acoustic wave and is what we hear. If we clap our hands in different ways we get different sounds.

 It must put a difference between sound and noise useful for so achieve the sound you want. Sound must be respected when designing a building is a physical system that have a requirement in the emotional sense of human beings that create a movement, depending on the quality of music. The amount of noise in a place depends on the activity taking place there, the intimacy that is sought to differentiate public areas and the consequences that can bring the sound in space. The acoustics in the theater depends on the priorities of the individual and the goals to be met in the place. 