Loudspeaker
Image
Photo:
The loudspeaker demonstrates the principle of electroacoustic sound transduction. See the video “Sound emission at the loudspeaker”.
Available in:
English, German
Type of media:
Image (296.6 kByte)
Last update:
2018-04-22
License:
This medium is made available under a CC BY-SA 4.0 international license.
What does this mean?
How to reference this medium
This medium is made available under a CC BY-SA 4.0 international license.
What does this mean?
How to reference this medium
Description:
The pitch-frequent alternating current supplied by an amplifier flows through a coil in the loudspeaker. In so-called dynamic loudspeakers, this coil is in a ring-shaped permanent magnetic field. The coil is connected to a diaphragm. Through the passage of the alternating current, forces now begin to have an effect on the coil which is moved to and fro in time with the pitch frequency. The diaphragm is moved and transmits its vibration to the air, the sound is emitted.
Information and ideas:
The process of electroacoustic sound transduction can be explained very well to the students with the help of a technical device that is familiar to all of them. Furthermore, the production and propagation of sound waves – important in human physiology for hearing and speaking – can be shown.
Relevant for teaching:
Communication and understanding
Vibrations and waves
Acoustic phenomena
Information and ideas:
The process of electroacoustic sound transduction can be explained very well to the students with the help of a technical device that is familiar to all of them. Furthermore, the production and propagation of sound waves – important in human physiology for hearing and speaking – can be shown.
Relevant for teaching:
Communication and understanding
Vibrations and waves
Acoustic phenomena
Related media:
There are no other media directly related to this file.
Learning resource type:
Example
Subjects:
Personal, social and health education (PSHE); Physics; Technology
Grade levels:
Grade 1 to 4; Grade 5 to 6; Grade 7 to 9; Grade 10 to 13
School types:
Elementary school; Middle/high school; Vocational training
Keywords:
Electroacoustics; Sound; Electroacoustics; Sound production; Sound propagation; Sound transduction
Bibliography:
Siemens Stiftung Media Portal
Author:
MediaHouse GmbH
Rights holder:
© Siemens Stiftung 2018