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Questions and Answers
Can sound pass through water?
A human can hear sounds up to 30 KHz?
Can sound travel through space?
Do light and sound travel in waves?
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The larger the amplitude of the wave on the trace, the louder the sound. The bigger the wave you can see, the ______ the sound.
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The loudest sound has the largest amplitude. Amplitude is the distance from the horizontal line to the peak of each curve. The larger the amplitude, the more energy a wave has. Therefore, the loudest sound is represented by the ______ amplitude.
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Study Notes
Sound and Wave Model
- Sound is defined as vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear.
Characteristics of Sound
- Sound travels in waves through objects or air.
- Acoustic refers to the properties or qualities of a room or building that determine how sound is transmitted in it.
- Acoustic also refers to the branch of physics concerned with the properties of sound.
Production and Transmission of Sound
- Sound is produced by a vibration and travels as a longitudinal wave.
- Sound travels through air by making air molecules vibrate.
- The vibrations are picked up by the ear and sent to the brain as a message.
The Ear
- Sound waves are collected by the ear lobe or pinna.
- The waves travel along the ear canal and make the ear drum vibrate.
- The vibrations are amplified by the small bones (ossicles) and converted into electrical signals by the cochlea.
- The auditory nerve takes the signals to the brain.
Independent Task 1: Quiz
- Sound can pass through water, but not through space.
- A human can hear sounds up to 20 kHz, not 30 kHz.
Signal Generators and Oscilloscopes
- Signal generators can produce signals over a range of frequencies and varying amplitudes.
- Oscilloscopes allow us to study the frequency and loudness of a sound.
Pitch (or Frequency)
- The shorter the wavelength of the wave, the higher the frequency of the sound.
- The more waves you see, the higher the pitch/frequency.
- The highest pitched sound has the shortest wavelength/most number of waves visible.
Loudness
- The larger the amplitude of the wave, the louder the sound.
- The bigger the wave you can see, the louder the sound.
- The loudest sound has the largest amplitude.
Oscilloscope Traces
- The amplitude of the wave is the distance from the horizontal line to the peak of each curve.
- The larger the amplitude, the more energy a wave has.
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Description
Learn about the characteristics of sound waves, how they travel, and how to measure their intensity. Understand the definition of sound and its acoustic properties.
