Acoustics

  ACOUSTICS 
 * ** Speed: ** Is the distance travelled in unit time (m/s)
 * ** Frequency: ** is the Number of complete waves in one second. This is measured in Hertz(Hz)
 * ** Wavelength: ** is the distance between matching points on the wave (m)
 * ** Longitudinal: ** Vibration parallel to direction of travel 
 * <span style="line-height: 18pt; margin: 0cm 0cm 10pt; mso-list: l0 level1 lfo1; mso-margin-bottom-alt: auto; mso-margin-top-alt: auto; tab-stops: list 36.0pt;">** <span style="font-family: 'Verdana','sans-serif'; font-size: 12pt;">Transverse: **<span style="font-family: 'Verdana','sans-serif'; font-size: 12pt;"> Vibration at right angle to direction of travel <span style="font-family: 'Times New Roman','serif'; font-size: 12pt;">
 * <span style="color: black; line-height: 18pt; margin: 0cm 0cm 10pt; mso-list: l0 level1 lfo1; mso-margin-bottom-alt: auto; mso-margin-top-alt: auto; tab-stops: list 36.0pt;">**<span style="font-family: 'Verdana','sans-serif'; font-size: 12pt;">Bearing: **<span style="font-family: 'Verdana','sans-serif'; font-size: 12pt;">a supporting part of a structure
 * <span style="line-height: 18pt; margin: 0cm 0cm 10pt; mso-list: l0 level1 lfo1; mso-margin-bottom-alt: auto; mso-margin-top-alt: auto; mso-outline-level: 4; tab-stops: list 36.0pt;">**<span style="color: black; font-family: 'Verdana','sans-serif'; font-size: 12pt;">Demountability: **<span style="color: black; font-family: 'Verdana','sans-serif'; font-size: 12pt;">to take apart; disassemble <span style="font-family: 'Times New Roman','serif'; font-size: 12pt;">
 * <span style="color: black; line-height: 18pt; margin: 0cm 0cm 10pt; mso-list: l0 level1 lfo1; mso-margin-bottom-alt: auto; mso-margin-top-alt: auto; mso-outline-level: 4; tab-stops: list 36.0pt;">** <span style="font-family: 'Verdana','sans-serif'; font-size: 12pt;">Noise: **<span style="font-family: 'Verdana','sans-serif'; font-size: 12pt;">Is the unwanted sound it can damage the audible system <span style="font-family: 'Verdana','sans-serif'; font-size: 10pt;">

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<span style="color: black; font-family: 'Verdana','sans-serif';"> <span style="color: black; font-family: 'Verdana','sans-serif';"><span style="color: black; font-family: 'Verdana','sans-serif'; font-size: 16pt; font-weight: normal; line-height: 115%;"> VIDEO: ** <span style="color: black; font-family: 'Verdana','sans-serif'; font-size: 16pt; line-height: 115%;">//<span style="font-family: 'Verdana','sans-serif'; font-style: normal;">The Sound Sources // **

<span style="font-family: 'Verdana','sans-serif'; font-size: 9pt;"> ==== <span style="font-family: 'Verdana','sans-serif'; font-size: 12pt; line-height: 115%;">Sound is caused by vibrations and is a form of kinetic energy. The air is pushed at a higher pressure an pulled apart at a lower pressure. These changes in pressure are passed through the air in the form of sound waves ==== ====<span style="font-family: 'Verdana','sans-serif';">Waves carry energy from one place to another, sound, light and radio signals all travel in the form of waves Also exist the noise, that is a term often used to refer to an unwanted sound. It can cause damage our [|auditory system]. ==== ====<span style="font-family: 'Verdana','sans-serif';">An impulsive sound is <span style="color: black; font-family: 'Verdana','sans-serif';">A sound that lasts for a short period of time and includes frequencies over a large portion of the acoustic spectrum, such as a hammer blow or hand clap. ====

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