The Anatomy of a Speaker: Pt 2
14 Dec 2014
There are many other types of driver designs beyond the common cone-and-coil construction.
- Horn speakers are acoustic megaphones that require very large enclosures to be able to reproduce sound.
- Piezoelectric speakers are commonly used in electronic devices to reproduce beeps as in, say, a watch.
- Instead of using a magnetic field to reproduce sound as in a dynamic speaker, electrostatic speakers use a high voltage electrical field to drive a statically charged membrane.
- Magnetostrictive speakers originated in sonar technology. In this design, the magnet-and-coil assembly remains stationary instead of moving with the driver.
- Ribbon and planar magnetic speakers use a ribbon of metal suspended in a magnetic field. When an electrical signal is applied to the ribbon, it moves and produces sound.
- Flat panel speakers feature voice coils mounted directly onto flat panels that can be hung almost invisibly on walls.
- Other speaker designs include plasma arc, distributed mode, bending wave and Heil air motion transducers.