AN INJECTION OLFACTOMETER FOR HUMANS AND A NEW METHOD FOR THE MEASUREMENT OF THE SHAPE OF THE OLFACTORY PULSE

An injection olfactometer for human psychophysical experiments is desc ribed. The olfactometer is capable of presenting, either mono- or birh inally, single odorants and binary mixtures. The pulse form of the olf actory stimulus at the exit of the olfactometer approaches a rectangul ar form, which makes the olfactometer well suited for olfactory reacti on time measurements. Since stimulation periods are independent of the subject's inhalation, time-intensity measurements over prolonged peri ods of time are possible as well. In the second part of this paper, a new technique is described for the measurement of the stimulus pulse f orm at the exit of the olfactometer.