What is frequency?
A sound’s pitch is determined by the number of changes in pressure per second, and is expressed in Hertz [Hz]. The human ear is able to perceive pitches between about 20 Hz (the lowest note on a large pipe organ) and about 20,000 Hz, like the sharp, high note of a dog whistle, which humans can only just hear. The ear is most sensitive to sound waves with a frequency of between 1,000 and 6,000 Hz.
- How does hearing work?
- What is noise?
- What is frequency?
- When does sound
become dangerous? - How can you tell whether
your hearing has been damaged? - Does noise affect more
than just the hearing? - Can ears be "trained"?
- Which sources can be harmful?
- How long does it take before
noise becomes dangerous? - How can one prevent
hearing damage? - Which types of hearing
protectors are there?
