Acoustics

**ACOUSTICS**

Speed : is the distance travelled during a unit of time by a sound wave propagating through an elastic medium.

Frequency: is the number of occurrences of a repeating event per unit time. It is a measured in Hertz (Hz). The frequency of an oscillating sound wave helps determine its pitch. 

Wavelength: is a measure of the distance between repetitions of a shape feature such as peaks, valleys, or zero-crossings, not a measure of how far any given particle moves.



Longitudinal waves: are waves that have the same direction of vibration as <span style="background-color: #ffffff; color: #000000; font-family: Georgia,serif; font-size: 90%; text-align: start; text-decoration: none; vertical-align: baseline;"> their direction of travel. Sound is transmitted through gases, plasma, liquids and solids as longitudinal waves.

<span style="background-color: transparent; color: #000000; font-family: serif; font-size: 16px; text-decoration: none; vertical-align: baseline;">

<span style="background-color: transparent; color: #000000; font-family: Georgia,serif; font-size: 16px; text-decoration: none; vertical-align: baseline;"><span style="background-color: transparent; color: #000000; font-size: 16px; text-align: start; text-decoration: none; vertical-align: baseline;"><span style="color: #6d00ff; font-family: Georgia,serif; font-size: 90%;">Transverse wave: <span style="font-family: Georgia,serif; font-size: 90%;">is a moving wave that consists of oscillations occurring perpendicular (or right angled) to the direction of energy transfer. <span style="background-color: transparent; color: #000000; font-family: Georgia,serif; font-size: 90%; text-align: start; text-decoration: none; vertical-align: baseline;"> Sound is transmitted through solids as transverse waves.

<span style="color: #6d00ff; font-family: Georgia,serif;">Sound waves abd their sources**//://**


 * 1) <span style="font-family: Georgia,serif; font-size: 90%;">Sound is normally caused by objects vibrating.
 * 2) <span style="font-family: Georgia,serif; font-size: 90%;">Large objects create large wavelength with low pitch or low frequency. Small objects create small wavelength with high pitch or high frequency waves.
 * 3) <span style="font-family: Georgia,serif; font-size: 90%;">The sound can be created by compressing and then releasing air molecules, doing that the sounds create.
 * 4) <span style="font-family: Georgia,serif; font-size: 90%;">If the objects producing the sounds is near, the energy is stronger, but if you are futher away from the objects, the energy is lower.
 * 5) <span style="font-family: Georgia,serif; font-size: 90%;">The acelerated sounds is form when something hits hard, which creates an inmediate expansive wave which acts like the sounds waves, but it has more range and they lose energy faster.
 * 6) <span style="font-family: Georgia,serif; font-size: 90%;">The speed of sound is easy reachable, but while you don't have reach it, the waves have time to move through the air, but if you reach the speed of sounds, the waves compress and explote and a sonic boom is created, this means that the speed of sound was broken by you.

<span style="font-family: Georgia,serif;"><span style="color: #6d00ff; font-family: Georgia,serif;">Reverberance is linked to the speed at which sound energy disappears in a room. An unfurnished room with hard surfaces, such as a church, is perceived as being more reverberant than a well-furnished living room.

<span style="font-family: Georgia,serif;"><span style="color: #6d00ff; font-family: Georgia,serif;">Room acoustics are about the way in which sound behaves in a room. Sound transmission, sound absorption, sound reflection and sound diffusion are all aspects that are important here. Room acoustics also include how we as humans perceive different acoustic phenomena. The field of building acoustics covers sound insulation too, where the route that the sound takes from the room to other areas is included. <span style="font-family: Georgia,serif;">To create the correct acoustic conditions is to create Room Acoustic Comfort. Room acoustic comfort is an important element of the sound environment concept and this, along with light, air and perception of the room, is in turn a natural component of the total indoor environment.