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Questions and Answers
What is the frequency range for sound waves that elicit an auditory percept in humans?
What are sound waves above 20 kHz known as?
What is the interdisciplinary science that deals with the study of mechanical waves in gasses, liquids, and solids including vibration, sound, ultrasound, and infrasound?
What is a scientist who works in the field of acoustics called?
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Which subdiscipline of acoustics is concerned with the recording, manipulation, mixing, and reproduction of sound?
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What gives rise to a magnetic field?
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Which materials are strongly attracted by magnetic fields and can be magnetized to become permanent magnets?
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What type of substances are weakly attracted to an applied magnetic field?
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Which materials are weakly repelled by a magnetic field?
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What is responsible for most of the effects of magnetism encountered in everyday life?
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Study Notes
Sound Waves and Acoustics
- The frequency range for sound waves that elicit an auditory percept in humans is not specified (but typically 20 Hz to 20,000 Hz).
- Sound waves above 20 kHz are known as ultrasound.
- The interdisciplinary science that deals with the study of mechanical waves in gasses, liquids, and solids including vibration, sound, ultrasound, and infrasound is acoustics.
- A scientist who works in the field of acoustics is called an acoustician.
Magnetism
- Electric currents give rise to a magnetic field.
- Ferromagnetic materials (such as iron, nickel, and cobalt) are strongly attracted by magnetic fields and can be magnetized to become permanent magnets.
- Paramagnetic substances (such as aluminum and oxygen) are weakly attracted to an applied magnetic field.
- Diamagnetic materials (such as copper and silver) are weakly repelled by a magnetic field.
- Electric currents are responsible for most of the effects of magnetism encountered in everyday life.
Subfields of Acoustics
- One subdiscipline of acoustics is audio engineering, concerned with the recording, manipulation, mixing, and reproduction of sound.
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Description
Test your knowledge of sound waves and how they propagate through different mediums and are perceived by humans. Explore the frequency range that elicits auditory perception and the wavelengths of sound waves in various mediums.
