Abstract: A pet waste material collector and odor eliminator system having in combination a rectangular container, a removable tray insertable in said container which holds litter material and has vents disposed around the upper vertical portions thereof, a filter pack, a fragrance dispenser, and a fan. The tray forms an air chamber between the bottom of the container and the bottom and sides of the removable tray. The fan pulls air and odors across the litter bed material, through the vents of the removable tray into the air chamber, through the air chamber and through a filter pack which absorbs and/or adsorbs the odors. The air is then pulled across an optional fragrance dispenser which masks any residual odors. The litter box also has a motion sensor device which automatically shuts off the fan as the pet approaches the litter box usually about 10 feet from the litter box.

Abstract: An apparatus for enhancing the environmental quality of work and living spaces which combines a high efficiency particulate air filter and an optional gas element and electric blower and a sound-masking device for generating pink noise. The sound-masking device is designed to improved the affective state, and thereby the task-performance, of persons in the space being treated.

Abstract: An apparatus for enhancing the environmental quality of work and living spaces is provided. The apparatus combines a high efficiency particulate air filter, a gas-adsorbent element, a means for moving air, a means for releasing a pleasant odor and a means for sound masking. The odor-releasing means and sound-producing means are designed to improve the affective state, and thereby the task-performance, of persons working in the space being treated. Preferred fragrances are citrus, floral, eucalyptus and mint, released at about 1 to 20 mg/hr. The sound masking is preferably accomplished by a sound-generating device which generates pink noise.