ACOUSTIC

__DEFINITIONS: __  .- __SPEED:__ its the distance traveled in unit time (m/s). .- __FREQUENCY__: its the number of complete waves in one second (Hz). .- __WAVELENGTH:__ its the distance between matching points on the wave (m). .- __LONGITUDINAL:__ its a vibration parallel to direction of travel. .- __TRANSVERSE__: its a vibration at right angle to direction of travel.

We can learn too, that the objects as a large they are make big waves and lower pits or lower frequency, and the small objects on the other hand creates small wives and that’s create higher pits or higher frequency. Laugh speakers cause wives of vibrations causing compressions or higher pressures and they move the air causing refractions and this is a way that gives us a sound waves. It has a lot of sources of sounds; it can be made by applause, broken glass, vibrations of some materials, etc.
 * __On the video__** **__Sound __****__ Waves And Their **Sources ** __****__: __** we can see how sound is created, and this is caused by the objects vibrations, he gave us an example of move lips and we can make vibrations with our lips resulting sounds.

__**On the video of the interview about noise and sound of professor Murray Hodgson with Vancouver by Design on March 2007**__, we can see how is the sound in space, it can be noise that are other people talking, music, etc or can be signal that is the wanted and useful sound like a voice of person which are talking to you, and it’s a reverberation too that is the eco in the room of every sounds funded. The acoustical environment is something that can be design by architect chosen the materials, etc. it will be depend of the priorities of the place, its different a concert hall than a room class or another place. .