SOUND SELECTABLE

Brand	Owner	Address	Description
ADAPTATONE	GSBS DEVELOPMENT CORPORATION	13515 BALLANTYNE CORPORATE PLACE CHARLOTTE NC 28277	Sound Selectable, Electronic Audible Signal Apparatuses Comprising a Heavy Duty Sound Signal Apparatus Capable of Selectively Generating Any One of a Plurality of Audibly Distinct Signals and for Use in Locations Where a High Decibel Reliable Distinctive Tone Signal is Required;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A sound focus speaker adopting a gas-filled sound lens enhances efficiency of transferring sound from a source to target area and of protecting a spread of transferred sound. The sound focus speaker includes a gas-filled sound lens, sound sources for generating sound and a sound-absorption room for surrounding the sound lens and the sound sources. Sound emitted from the sound focus speaker is focused at specific distance to make a focus point and not spread to the outer of the focus point from forming a sound area.