Active odor cancellation

Abstract

The present disclosure relates to methods, devices and systems for calculating or selecting a first set of chemical compounds for an odor additive. For example, a method identifies a second set of chemical compounds present in a sample and intensities of individual chemical compounds in the second set of chemical compounds, and calculates the first set of chemical compounds for the odor additive such that an olfactory perception of a mixture of the sample and the odor additive is an olfactory white.

What is claimed is: 
     
         1 . A device for calculating a first set of chemical compounds for an odor additive, the device comprising:
 a processor; and   a computer-readable medium storing instructions which, when executed by the processor, cause the processor to perform operations, the operations comprising:
 identifying a second set of chemical compounds present in a sample and intensities of individual chemical compounds in the second set of chemical compounds; and 
 calculating the first set of chemical compounds for the odor additive such that an olfactory perception of a mixture of the sample and the odor additive is an olfactory white. 
   
     
     
         2 . A method for selecting a first set of chemical compounds for an odor additive, the method comprising:
 identifying a second set of chemical compounds present in a sample;   determining a set of physicochemical properties of chemical compounds in the second set of chemical compounds;   calculating physicochemical properties for the odor additive such that an olfactory perception of a mixture of the sample and the odor additive is an olfactory white; and   selecting the first set of chemical compounds for the odor additive, wherein, when the first set of chemical compounds that are selected are mixed to form the odor additive, the odor additive comprises the physicochemical properties that are calculated for the odor additive.   
     
     
         3 . The method of  claim 2 , wherein the calculating the first set of chemical compounds for the odor additive comprises:
 minimizing a difference between a vector projection of the mixture of the sample and the odor additive in a perceptual space with a vector projection of the olfactory white in the perceptual space.   
     
     
         4 . A system for calculating a first set of chemical compounds for an odor additive, the system comprising:
 a gas chromatography apparatus for detecting a second set of chemical components present in a sample;   a processor for calculating the first set of chemical compounds for the odor additive such that an olfactory perception of a mixture of the sample and the odor additive is an olfactory white; and   a compound mixer for mixing the first set of chemical compounds that are calculated for the odor additive to create the odor additive.