Sound Reproduction Topic

Audio Systems

Concept 1 demo

Audio cart with two stacked Agilent signal generators on left, microphone on stand, Behringer Eurolive speaker in center, and widescreen oscilloscope displaying sine wave on right

Sound Cart

A self-contained audio cart with signal generators, oscilloscope, microphone, and speaker for demonstrating waveforms, frequency, amplitude, harmonics, beat frequencies, and wave superposition. The oscilloscope can be projected via VGA for …

Loudspeakers

Concept 2 demos

Side view of paper speaker: white picnic plate supported on foam core base with copper wire coil wound around small NdFeB disc magnets beneath the plate center, BNC connector at left

Paper Speaker

A DIY speaker built from a paper plate, magnets, and copper wire shows how alternating current through a voice coil drives mechanical vibrations. At low frequencies (12--15 Hz) the plate …

Assembled half of cutaway speaker showing cone, corrugated spider, voice coil region, and black metal frame

Cutaway Speaker

A speaker cut in half reveals the internal construction of a dynamic loudspeaker. Students see how the cone, suspension, voice coil, and magnet assembly work together to convert electrical signals …