Analog signal

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/analog-signal

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the signal characteristic?Continuous-time signal, capable of representing an infinite continuum of values
2. What is the representation fidelity?Directly analogous to the physical quantity it represents, preserving subtle variations
3. Why do analog signals sound better than digital?Because analog signals copy the sound wave directly, they keep every small nuance. Digital signals cut the wave into steps, which can lose some subtle sounds.
4. How did the phonograph use analog signals?The phonograph recorded sound by carving tiny grooves into a cylinder or disc. When a needle traced those grooves, it turned the groove shape into a smooth electrical signal that could be played back.

Quantization: The process of mapping a continuous range of values to a smaller, discrete set of values.
Discretization: The process of converting a continuous signal into a discrete one.
Fidelity: The degree to which an analog signal accurately represents the original source information.