Sound Notes Sound Sound is created by a
![Sound Notes Sound Notes](https://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-1.jpg)
Sound Notes
![Sound • • Sound is created by a vibration It is a mechanical wave(longitudinal) Sound • • Sound is created by a vibration It is a mechanical wave(longitudinal)](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-2.jpg)
Sound • • Sound is created by a vibration It is a mechanical wave(longitudinal) Requires a medium DEMO
![Speed of Sound • Speed of sound is dependent on the: • Medium –the Speed of Sound • Speed of sound is dependent on the: • Medium –the](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-3.jpg)
Speed of Sound • Speed of sound is dependent on the: • Medium –the more dense the medium the _______ • Temperature-the higher the temp the ______. About. 6 m/s per degree increase • Altitude – the higher the altitude the _____ • 343 m/s super sonic
![Frequency • Number of vibrations per second • It is a quanitative value measured Frequency • Number of vibrations per second • It is a quanitative value measured](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-4.jpg)
Frequency • Number of vibrations per second • It is a quanitative value measured in ____
![Pitch • It is a qualitative value • It is directly related to frequency Pitch • It is a qualitative value • It is directly related to frequency](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-5.jpg)
Pitch • It is a qualitative value • It is directly related to frequency • Hi Freq= Hi pitch/Low freq=Low pitch
![Loudness • Loudness can be qualitative value or It can be quanitative • It Loudness • Loudness can be qualitative value or It can be quanitative • It](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-6.jpg)
Loudness • Loudness can be qualitative value or It can be quanitative • It is directly related to amplitude
![Amplitude • Amplitude is the amount of energy in a wave • It is Amplitude • Amplitude is the amount of energy in a wave • It is](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-7.jpg)
Amplitude • Amplitude is the amount of energy in a wave • It is directly related to loudness
![Decibels • The units to measure loudness of a sound quanitatively • It is Decibels • The units to measure loudness of a sound quanitatively • It is](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-8.jpg)
Decibels • The units to measure loudness of a sound quanitatively • It is a log scale • What is a Decibel?
![Decibels Decibels](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-9.jpg)
Decibels
![Resonance • Ability of an object to vibrate at its natural frequency • http: Resonance • Ability of an object to vibrate at its natural frequency • http:](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-10.jpg)
Resonance • Ability of an object to vibrate at its natural frequency • http: //www. youtube. com/watch? v=3 mclp 9 Qm. C Gs • https: //www. youtube. com/watch? v=Ude 8 p. Pjaw KI • https: //www. youtube. com/watch? v=0 K 8 zs-KSitc watch to the 2: 20 mark of this one • https: //www. youtube. com/watch? v=od. Jx. JRAxd. F U
![Resonance • Ability of an object to vibrate at its natural frequency • Hair Resonance • Ability of an object to vibrate at its natural frequency • Hair](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-11.jpg)
Resonance • Ability of an object to vibrate at its natural frequency • Hair Trick
![Reflection • It is the bouncing back of a wave. In sound it is Reflection • It is the bouncing back of a wave. In sound it is](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-12.jpg)
Reflection • It is the bouncing back of a wave. In sound it is an____.
![Echolocation • The use of sound to locate objects • Some species of animals Echolocation • The use of sound to locate objects • Some species of animals](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-13.jpg)
Echolocation • The use of sound to locate objects • Some species of animals use it to locate prey ex. bats, dolphins • https: //www. youtube. com/watch? v =Z_E 3 zxx 2 l 9 g
![SONAR • Acronym that represents Sound Navigation and Ranging • Used to detect objects SONAR • Acronym that represents Sound Navigation and Ranging • Used to detect objects](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-14.jpg)
SONAR • Acronym that represents Sound Navigation and Ranging • Used to detect objects underwater • New technology used in WWII • What is SONAR
![Ultrasound • A sound greater than 20, 000 Hz • Used in medicines to Ultrasound • A sound greater than 20, 000 Hz • Used in medicines to](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-15.jpg)
Ultrasound • A sound greater than 20, 000 Hz • Used in medicines to diagnose disease • Humans can only detect sounds from 20 Hz-20, 000 Hz • Tone Generator and Beat
![Interference • Constructive – consonance – a pleasant set of pitches • Destructive – Interference • Constructive – consonance – a pleasant set of pitches • Destructive –](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-16.jpg)
Interference • Constructive – consonance – a pleasant set of pitches • Destructive – dissonance – an unpleasant set of pitches • Interference waves
![Beat • Oscillation of wave amplitude that occurs as a result of the superposition Beat • Oscillation of wave amplitude that occurs as a result of the superposition](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-17.jpg)
Beat • Oscillation of wave amplitude that occurs as a result of the superposition of two sound waves having nearly identical frequencies. • Tone Generator and Beat
![Octave • Two musical notes with frequencies related by a 1: 2 ratio. Octave • Two musical notes with frequencies related by a 1: 2 ratio.](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-18.jpg)
Octave • Two musical notes with frequencies related by a 1: 2 ratio.
![Doppler Effect/ Shift • An apparent change in sound frequency due to relative motion Doppler Effect/ Shift • An apparent change in sound frequency due to relative motion](http://slidetodoc.com/presentation_image/39e38e22018d43bad30cb6235f68d655/image-19.jpg)
Doppler Effect/ Shift • An apparent change in sound frequency due to relative motion of either the source or the detector. • Ex. – radar gun, astronomy, meteorology, train, sirens…
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