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Presentation of sound unit 10

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Naila Anjum

1) Sound is a form of energy that travels in waves and more quickly through solids than liquids or gases. There are two main types of sound - musical sounds produced by regular vibrations and noise sounds from irregular vibrations. 2) The ear takes in sound waves and converts them to signals sent to the brain. Sound waves move through three parts of the ear - the outer, middle, and inner ear. 3) Pitch depends on the frequency of a sound wave, with a higher pitch associated with a higher frequency and shorter wavelength. Musical instruments can be played at different pitches by changing the lengths or thicknesses of their parts.

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SUBJECT : SCIENCE BY MS. naila anjum
Unit :10 Sound
Overview The Facts of Sound Examples of objects produces sound The Ear and Sound Sound Vocabulary Musical Instruments and Sound
The Facts Sound 1. Is a form of energy produced & transmitted by vibrating matter 2. Travels in waves 3. Travels more quickly through solids than liquids or gases
Kinds of sounds 1. Musical sound: Musical sound results when regular vibrations of the voice or a musical instrument are produced. 2. Noise sound: Noise results when irregular vibrations are made at irregular times.
Examples of things which produces sounds
The Ear Sound is carried to our ears through vibrating air molecules. Our ears take in sound waves & turn them into signals that go to our brains. Sound waves move through 3 parts of the ear; outer ear, middle ear, & inner ear. Middle Ear
Vibration - Back and forth movement of molecules of matter - For example,
Compression - Where molecules are being pressed together as the sound waves move through matter - For example, - a wave travels through the springs just like sound waves travel through the air - the places where the springs are close together are like compressions in the air.
Sound Waves - Alternating areas of high & low pressure in the air - ALL sound is carried through matter as sound waves - Sound waves move out in ALL directions from a vibrating object
Wavelength & Frequency - Wavelength is the distance between one part of a wave and the same part of the next wave - Frequency is the number of waves moving past a point in one second
Pitch A measure of how high or low a sound is Pitch depends on the frequency of a sound wave For example, - Low pitch - High pitch - Low frequency - High frequency - Longer wavelength - Shorter wavelength
Reflection of sound - An instrument that uses reflected sound waves to find underwater objects - For example, Humans use sonar to locate or map objects Animals use sonar or echo location to find their prey; these sounds have such a high pitch or frequency that the human ear cannot hear
How sound waves reflected?
What is echolocation?
Presentation of sound unit 10
Sound and Instruments - Instruments can be played at different pitches by changing lengths of different parts. - For example, - Another way to make different pitches is to change the thickness of the material that vibrates. - For example, A trombones mute absorbs some of the sound waves produced, thus producing a softer note when played.
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Presentation of sound unit 10

  • 1. SUBJECT : SCIENCE BY MS. naila anjum
  • 2. Unit :10 Sound
  • 3. Overview The Facts of Sound Examples of objects produces sound The Ear and Sound Sound Vocabulary Musical Instruments and Sound
  • 4. The Facts Sound 1. Is a form of energy produced & transmitted by vibrating matter 2. Travels in waves 3. Travels more quickly through solids than liquids or gases
  • 5. Kinds of sounds 1. Musical sound: Musical sound results when regular vibrations of the voice or a musical instrument are produced. 2. Noise sound: Noise results when irregular vibrations are made at irregular times.
  • 6. Examples of things which produces sounds
  • 7. The Ear Sound is carried to our ears through vibrating air molecules. Our ears take in sound waves & turn them into signals that go to our brains. Sound waves move through 3 parts of the ear; outer ear, middle ear, & inner ear. Middle Ear
  • 8. Vibration - Back and forth movement of molecules of matter - For example,
  • 9. Compression - Where molecules are being pressed together as the sound waves move through matter - For example, - a wave travels through the springs just like sound waves travel through the air - the places where the springs are close together are like compressions in the air.
  • 10. Sound Waves - Alternating areas of high & low pressure in the air - ALL sound is carried through matter as sound waves - Sound waves move out in ALL directions from a vibrating object
  • 11. Wavelength & Frequency - Wavelength is the distance between one part of a wave and the same part of the next wave - Frequency is the number of waves moving past a point in one second
  • 12. Pitch A measure of how high or low a sound is Pitch depends on the frequency of a sound wave For example, - Low pitch - High pitch - Low frequency - High frequency - Longer wavelength - Shorter wavelength
  • 13. Reflection of sound - An instrument that uses reflected sound waves to find underwater objects - For example, Humans use sonar to locate or map objects Animals use sonar or echo location to find their prey; these sounds have such a high pitch or frequency that the human ear cannot hear
  • 14. How sound waves reflected?
  • 17. Sound and Instruments - Instruments can be played at different pitches by changing lengths of different parts. - For example, - Another way to make different pitches is to change the thickness of the material that vibrates. - For example, A trombones mute absorbs some of the sound waves produced, thus producing a softer note when played.