Radio attachable to spectacles

Radio, infrared, and audio assistive listening device

Receiver

Receptacle for earphone cord

Recreational bone conduction audio device, system

Releasably mounted compound loudspeakers

Remote controller having echo function

Removable bag for mounting of stereo system on two-wheeled vehic

Rotary canister base

Sampled chamber transducer with enhanced low frequency response

Self-adjusting earloop for an over-the-ear headset

Self-adjusting earloop for an over-the-ear headset

Self-adjusting earloop for an over-the-ear headset

Shoulder-mount speaker and audio equipment

Single and double symmetric loudspeaker driver configurations

Snap-in attachment for ear defender cup

Soft-opening hinge and headphone including same

Sound collector

Sound device mounted in a helmet

Sound emitting device with an expandable earpiece