Engineering Acoustics/Transducers - Loudspeaker

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Part 1: Lumped Acoustical Systems1.

Part 2: One-Dimensional Wave Motion2.12.22.3

Part 3: Applications3.

Acoustic Transducer[edit]

The purpose of the acoustic transduer is to convert electrical energy into acoustic energy. Many variations of acoustic transducers exists, although the most common is the moving coil-permanent magnent tranducer. The classic loudspeaker is of the moving coil-permanent magnet type.

The classic electrodynamic loudspeaker driver can be divided into three key components:

1) The Magnet Motor Drive System

2) The Loudspeaker Cone System

3) The Loudspeaker Suspension

This illustration shows a cut-away of the moving coil-permanent magnet loudspeaker.

Woofer Picture here

Magnet Motor Drive System[edit]

Loudspeaker Cone System[edit]

Loudspeaker Suspension[edit]

An equivalent circuit can be used to model all three loudspeaker components as a lumped system. This circuit provides a model of the loudspeaker and its separte sub-componenets and can be used to provide insight into what parameters alter the loudspeaker's performance.