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Sound: The Piano

Related Article: Learn more about acoustics.

Pianos transfer energy in order to create sound.
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Exploring Sound: Digital Sound

Exploring Sound: Digital Sound (1:22)

Laser discs such as CDs and DVDs carry digital information, which is represented by the binary code -- combinations of 1s and 0s. Any number can be represented in binary code. Learn how this information is encoded in this clip.

Battle Science: The Invention of Radar

Battle Science: The Invention of Radar (2:46)

On TLC's "Battle Science," learn how radar was invented.

Exploring Sound: Sound Waves

Exploring Sound: Sound Waves (2:03)

The vibrations of an object compacts air molecules in some places (compression) and causes expansion of air in other places (rarefaction).

Exploring Sound: Frequency

Exploring Sound: Frequency (1:28)

Frequency is the rate of vibration of sound and is measured in hertz. One vibration per second is one hertz.

Exploring Sound: Echo Location

Exploring Sound: Echo Location (2:21)

Bats hunt by echolocation. The best condition for an echo is a hard surface. Some materials absorb sound. Curved surfaces are used to reflect sound over a large area.

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Basics of Physics: Exploring Sound

Basics of Physics: Exploring Sound (23:59)

Sounds are an important part of our world; we can identify things from the sounds they make, and we associate certain sounds with particular objects or activities. This program describes how our ears work and the range of vibrations we are able to... More »

The Basics of Physics: Exploring Sound

The Basics of Physics: Exploring Sound (22:14)

In this video, viewers are introduced to many sources of sound, including non-musical and musical. The program also explores various properties of sound, including the structure of sound waves and how sound travels through out different substances.

A Sense for Technology: The Science of Sight and Sound

A Sense for Technology: The Science of Sight and Sound (54:00)

Investigate the science of sight and sound in this video. Four segments demonstrate how technology is being used to study -- and in some cases improve -- the way we see and hear.

Breaking the Silence: An Introduction to Sound

Breaking the Silence: An Introduction to Sound (27:00)

Watch this clip to learn how all sounds, from the soft rustling of leaves to the deafening clatter of a jack hammer, are caused by vibration.

Physical Science: Sound

Physical Science: Sound (20:00)

Sound is energy that travels in waves. Our ears are capable of receiving the waves and transmitting them through the eardrum and ear bones to the cochlea, which converts the vibrations into electrical impulses that the brain can interpret.

Elements of Physics: Energy and Waves

Elements of Physics: Energy and Waves (20:00)

Energy, whatever its form, is propagated as waves. This program begins by looking at different types of waves and their common characteristics, and it concludes with a look at a modern theory called the wave-particle duality.

Exploring Sound: Test Your Knowledge

Exploring Sound: Test Your Knowledge (2:28)

Take a look at this quiz to test your knowledge of the facts in this Exploring Sound series.

Exploring Sound: A Sound Review

Exploring Sound: A Sound Review (0:47)

Check out this video for a review of the Exploring Sound series.

Exploring Sound: Digital Sound

Exploring Sound: Digital Sound (1:22)

Laser discs such as CDs and DVDs carry digital information, which is represented by the binary code -- combinations of 1s and 0s. Any number can be represented in binary code. Learn how this information is encoded in this clip.

Exploring Sound: Music Pitch and Rhythm

Exploring Sound: Music Pitch and Rhythm (4:26)

Music is different from noise because music is made up of regular sound patterns. It has pitch, rhythm and quality. Pitch has to do with the frequency of vibrations. Close vibrations produce high notes, and spread-out vibrations produce low notes.