4.7.2.4 Loudspeakers (HT only)

Spec reference: 4.7.2.4 (physics only) (HT only).

Triple-only content in this dot

• Loudspeakers/headphones use motor effect to convert electrical variations to sound pressure waves.

Exam quick-check

• Can I identify this as a triple-only point from wording in the question?
• Can I apply the correct equation/idea with units and a clear conclusion?