Figure 6: Design of the method.
The subject is constantly stimulated with odorized air, at a constant flow, during 120 s (olfactometer). Simultaneously, they evaluated intensity, by increasing or releasing the pressure applied on a syringe filled with air (intensity-like pressure device). The pressure applied is transformed by and AD converter into a value of intensity between 0 and 100. Subjects received a feedback of their continuous rating on a light scale. The intensity-like pressure device is calibrated at the beginning of each day of testing. (Computer image has been designed by lvaro_cabrera - Freepik.com. Olfactometer image has been designed by Freepik. Hand and syringe image has been designed by johnny_automatic from vector.me.).
