PHYSICS HIGH SCHOOL

Evelyn learns that a sound wave can be recorded electronically as an analog signal or as a digital signal. She investigates these two signal types. She records her voice using a tape recorder, which uses an analog signal to produce sound when played back. She also records her voice using a computer, which uses a digital signal to produce sound when played back. Evelyn replays each recording 100 times.a. Describe a difference that Evelyn would most likely hear between the two recordings after being replayed 100 times.

b. Explain why the two recordings would sound different after being replayed 100 times.

Answers

Answer 1
Answer:

Answer:

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Explanation:
Answer 2
Answer:

Final answer:

Analog signals physically degrade each time they are played, causing a decrease in sound quality. Digital signals, however, will not experience any quality decline when being replayed multiple times because they are stored in binary form.

Explanation:

a. After being replayed 100 times, a major difference that Evelyn would most likely hear between the two recordings is that the analog recordings might have a loss in sound quality, and are likely to sound a bit more worn down or degraded. The digital recording, on the other hand, would sound just as it did the first time, having a high quality, and no loss of detail.

b. The reason for the difference in degradation is largely because of the nature of the two types of signals. An Analog signal is continuous and is an accurate representation of the sound wave as it varies in amplitude over time. However, an analog recording such as a tape, physically degrades each time it is played. Noise begins to rise while a decline in high-frequency content seems to appear. Digital signals, which are quantized representations of those same sound waves, do not degrade over time, because information is essentially coded in binary form. So, unless the file itself is damaged or corrupted, playing it back any number of times won't diminish its quality.

Learn more about Analog vs Digital Signals here:

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Explanation:

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Answers

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Explanation:

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