Transmitter

Summary: Ultrasound is sound with a frequency above 20 000 Hz. An ultrasonic transmitter produces a beam, or line, of ultrasound. You can produce a narrow beam of ultrasound more easily than a narrow beam of sound waves. Tags: science student-book-7 physics Created: 2026-05-21 Last Updated: 2026-05-21

Transmitter

Ultrasound is sound with a frequency above 20 000 Hz. An ultrasonic transmitter produces a beam, or line, of ultrasound. You can produce a narrow beam of ultrasound more easily than a narrow beam of sound waves.

Source

This concept is from the [Science Student Book 7](Science Student Book 7/Physics/Sound/2.5 Echoes and ultrasound.md), Physics section.