SOUND ACTUATED ELECTRONIC GRADE CONTROLS

Brand	Owner	Address	Description
TRACER-PLUS	SPECTRA-PHYSICS LASERPLANE, INC.	5475 KELLENBURGER ROAD DAYTON OH 454241099	sound actuated electronic grade controls for aligning construction and agricultural equipment on a predetermined course, and instruction manuals sold therewith;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A sound masking system according to the invention is disclosed in which one or more sound masking loudspeaker assemblies are coupled to one or more electronic sound masking signal generators. The loudspeaker assemblies in the system of the invention have a low directivity index and preferably emit an acoustic sound masking signal that has a sound masking spectrum specifically designed to provide superior sound masking in an open plan office. Each of the plurality of loudspeaker assemblies is oriented to provide the acoustic sound masking signal in a direct path into the predetermined area in which masking sound is needed. In addition, the sound masking system of the invention can include a remote control function by which a user can select from a plurality of stored sets of information for providing from a recipient loudspeaker assembly an acoustic sound masking signal having a selected sound masking spectrum.