POSTERS PICTURES CONTAINING SOUND

Brand	Owner	Address	Description
VISUAL REALITY	Crowley, Gerald James	535 Hill Church Road Boyertown PA 19512	posters and pictures containing sound emitters;
	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.