Fisika Dasar I - 17
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The document discusses properties of sound waves, including: 1. Sound waves can be longitudinal or transverse, and travel at different speeds in different media depending on factors like density and temperature. 2. The intensity of sound decreases with distance from the source according to the inverse square law. Intensity is measured in decibels on a logarithmic scale. 3. The Doppler effect causes changes in perceived frequency for observers moving toward or away from a sound source.
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Okay, let's break this down step-by-step:
* Mr. H vibrates the snakey 32 times in 10 seconds
* So the frequency is 32/10 = 3.2 Hz
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* With 5 nodes, this is the 5th harmonic standing wave pattern
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Table of Contents
Overview ......................................................................................................... 3
Objectives ....................................................................................................... 3
Time Requirements ........................................................................................ 3
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Report on ultrasound physics
By Ayah Abd-Elnasser Mohammad zaky
Biomedical Engineering Department
Cairo University
waves (version deux)
The document discusses different types of waves including transverse waves, where the displacement is perpendicular to the wave motion, and longitudinal waves, where the displacement is parallel. It defines key wave properties like amplitude, wavelength, frequency, and speed. Constructive and destructive interference are explained. Tsunamis can be caused by earthquakes, volcanoes, and landslides. Review questions test understanding of these concepts.
Physics_of_Ultrasonic.
The document discusses the nature and properties of sound waves. It covers topics such as:
- Sound is a mechanical longitudinal wave that consists of compressions and rarefactions, transferring energy through a medium.
- The frequency and intensity of sound waves can be measured, and the speed of sound depends on the properties of the transmitting medium.
- Sound waves are also discussed in the context of medical applications like hearing, sonar, and ultrasonic imaging techniques.
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Fisika Dasar I - 17
- 6. 01/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
- 7. Sound travels different speeds in different media. Sound typically travels faster in a solid that a liquid and faster in a liquid than a gas. The denser the medium, the faster sound will travel. The higher the temperature, the faster the particles of the medium will move and the faster the particles will carry the sound. 01/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
- 11. 01/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
- 17. The greater the intensity of sound the farther the sound will travel and the louder the sound will appear. Loudness is very closely related to intensity. Loudness is the human perception of the sound intensity. The unit for loudness is decibels . 01/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
- 19. Loudness in Decibels 01/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
- 20. The pitch of a sound wave is directly related to frequency . A high-pitched sound has a high frequency (a screaming girl). A low-pitched sound has a low frequency (a fog-horn). A healthy human ear can hear frequencies in the range of 20 Hz to 20,000 Hz . Humans cannot hear below 20 Hz. Sounds below this frequency are termed infrasonic . Sounds above 20,000 Hz are termed ultrasonic . Some animals, such as dogs, can hear frequencies in this range in which humans cannot hear. 01/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
- 21. 01/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
- 22. 01/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |
- 31. TERIMA KASIH 01/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |