Ch.12.less.2.what are the properties of sound -
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This document discusses the properties of sound. It defines sound as a type of energy that moves through matter in longitudinal waves of vibration. It describes how sound travels faster through solids than gases due to the closer packing of particles. Frequency is defined as the number of times a particle vibrates per second and is measured in Hertz. Pitch and frequency are related, but not the same - pitch is how our ears perceive sound based on the number of peaks in the vibrations. Amplitude refers to the density of particles during compression and rarefaction and is measured in decibels.
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Ch.12.less.2.what are the properties of sound -
- 2. Play a guitar. What do you hear?
- 3. Is a type of energy we hear. Sound
- 4. Moves quickly back and forth. Vibrates
- 6. Sound Waves Vibrations that move through matter
- 7. Direction of sound Direction of energy
- 8. Sound waves moves in the same direction the energy is moving in. Longitudinal Waves
- 9. Waves that move in a different direction. Transverse Waves
- 10. Sounds travel through 3 media. - Sound travels through the solid the fastest (energy passed through closely packed particles) - Sound travels through the gases the slowest.
- 11. Frequency The number of times a particle vibrates per second. Unit: Hertz (Hz).
- 12. Musical notes can be: High notes Low notes How high or low sound is. Pitch
- 13. Low pitch sounds has lower frequency. High pitch sounds has higher frequency.
- 14. Is there a difference between pitch and frequency? YES!!! Pitch is the way our ears hear sound. (The way we hear sound is related to the number of peaks BUT, they are not the same thing)
- 15. How to change pitch? High pitch Short guitar string Vibrates fast causing high pitch
- 16. Low pitch Long guitar string Vibrates slowly causing low pitch
- 17. When you are TALKING the sound waves will look like this When you are SCREAMING the sound waves will look like this When you are WHISPERING the sound waves will look like this
- 18. Amplitude How dense is the particles during compressions and rarefactions. Units: Decibels (dB)