How Does the Sound Get on Motion Picture Film?
How Does the Sound Get on Motion Picture Film? The sound in a motion picture is provided by a sound track that runs the length of the film o
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Electrical Signals
How Does Tape Recorder Work?
How Does Tape Recorder Work? The tape for a tape recorder is coated with tiny bits of iron. When you speak into a tape recorder microphone,
How Do Hearing Aids Work?
How Do Hearing Aids Work? Hearing aids change sounds into electrical signals that could then be amplified and converted back into sounds tha
How Does My Voice Go over the Telephone?
How Does My Voice Go over the Telephone? A basic phone consists of a microphone (which you talk into), an apparatus to change your voice int
How Does the Antenna on a Radio Work?
How Does the Antenna on a Radio Work? The wire antenna in a radio picks up radio waves sent out through the air by broadcasting stations. Th