A method for assessing the sillage of fragrance materials using a device comprising an evaluation tube that is open on both ends; a ventilation system; at least two lockable sniffing ports; a sample port; a sample plate; and optionally a sample holder for holding the sample plate; whereby said evaluation tube is aligned horizontally and equipped with said at least two sniffing ports and said sample port; the front opening of said evaluation tube is equipped with said ventilation system; at least one sniffing port is located in the front section and at least one sniffing port is located in the rear section of said evaluation tube; said sample port is located within the front section of said evaluation tube; and said sample port has a diameter allowing to introduce either the sample plate or the sample holder into the evaluation tube; comprising or consisting of the following steps: (i) providing a fragrance material and placing it on the sample plate; (ii) introducing the perfumed sample plate through the sample port into the evaluation tube; (iii) starting the ventilation system to provide a constant and defined air flow through the tube; (iv) connecting at least one sniffing port with an analytic instrument capable for objective determination of the intensity of fragrance; (v) opening at least one sniffing port for subjective determination of the intensity of fragrance by a trained individual; and (vi) obtaining an intimate sillage value by performing an evaluation on the sniffing port in the front section and obtaining a public sillage value by performing an evaluation on the sniffing port in the rear section. an evaluation tube that is open on both ends; a ventilation system; at least two lockable sniffing ports; a sample port; a sample plate; and optionally a sample holder for holding the sample plate; whereby said evaluation tube is aligned horizontally and equipped with said at least two sniffing ports and said sample port; the front opening of said evaluation tube is equipped with said ventilation system; at least one sniffing port is located in the front section and at least one sniffing port is located in the rear section of said evaluation tube; said sample port is located within the front section of said evaluation tube; and said sample port has a diameter allowing to introduce either the sample plate or the sample holder into the evaluation tube; comprising or consisting of the following steps: (i) providing a fragrance material and placing it on the sample plate; (ii) introducing the perfumed sample plate through the sample port into the evaluation tube; (iii) starting the ventilation system to provide a constant and defined air flow through the tube; (iv) connecting at least one sniffing port with an analytic instrument capable for objective determination of the intensity of fragrance; (v) opening at least one sniffing port for subjective determination of the intensity of fragrance by a trained individual; and (vi) obtaining an intimate sillage value by performing an evaluation on the sniffing port in the front section and obtaining a public sillage value by performing an evaluation on the sniffing port in the rear section. (i) providing a fragrance material and placing it on the sample plate; (ii) introducing the perfumed sample plate through the sample port into the evaluation tube; (iii) starting the ventilation system to provide a constant and defined air flow through the tube; (iv) connecting at least one sniffing port with an analytic instrument capable for objective determination of the intensity of fragrance; (v) opening at least one sniffing port for subjective determination of the intensity of fragrance by a trained individual; and (vi) obtaining an intimate sillage value by performing an evaluation on the sniffing port in the front section and obtaining a public sillage value by performing an evaluation on the sniffing port in the rear section.