Why do rotating loudspeakers howl? © Siemens Stiftung 2017 CC BY-SA 4.0 international

Why do rotating loudspeakers howl?

Text

Worksheet:
Just think: The Doppler effect experiment.

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2017-04-20
Not telling you here – just that it has something to do with the Doppler effect.

Information and ideas:
Sometimes the questions can be put in lessons in an equally striking way as in (good) science programmes on TV. The experience that using your own sense of intellect is fun, cannot be made often enough at school.

Relevant for teaching:
Acoustic phenomena
Sound/acoustics: parameters
Worksheet (printable)
Physics; Technology
Grade 5 to 6; Grade 7 to 9; Grade 10 to 13
Middle/high school; Vocational training
Electroacoustics; Sound
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