FM broadcasting

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/fm-broadcasting

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. Who invented FM broadcasting?1933
2. What is the broadcasting principle?Utilizes Frequency Modulation (FM) to encode audio onto a carrier wave
3. What is the inventor?Edwin Armstrong
4. How does FM make sound clearer than AM?FM changes the frequency of the radio wave instead of its strength, so it is less affected by static and noise, giving a cleaner, richer sound.
5. Why does FM have a smaller range than AM?FM uses higher frequencies that travel in straight lines, so mountains and buildings can block the signal, making its range smaller.

Frequency Modulation (FM): A method of encoding information by varying the instantaneous frequency of a carrier wave in proportion to the modulating signal.
Carrier Wave: A stable, high-frequency electromagnetic wave used as a vehicle for transmitting information signals over distances.
High-Fidelity (Hi-Fi): Reproduction of sound with a high degree of accuracy, capturing subtle details and dynamic range of the original performance.
Signal-to-Noise Ratio (SNR): A measure comparing the level of a desired signal to the level of background noise; a higher SNR indicates a cleaner signal.