Directional sound

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/directional-sound

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 critical application?Emergency evacuation guidance systems, offering intelligible and targeted auditory instructions
2. What is the development drivers?Advancements in digital signal processing, transducer miniaturization, and computational acoustics
3. How do directional speakers make sound go in one direction?They use many small speakers arranged in a pattern and control the timing and strength of each one so the waves add up in one direction and cancel out in others.
4. Why is directional sound useful for emergencies?It can send clear instructions to specific rooms or hallways during a fire or other danger, so people hear the right message without being overwhelmed by noise.

Directional Sound: Acoustic technology designed to project sound energy in a specific, narrow beam.
Phased Array: A configuration of multiple sound emitters whose signals are manipulated to steer the acoustic beam.
Parametric Array: A system that generates audible sound from the non-linear interaction of high-frequency ultrasonic waves.
Acoustic Collimation: The process of focusing sound waves into a narrow, parallel beam.