Fig. 2From: Assessment of olfactory detection thresholds in children with autism spectrum disorders using a pulse ejection systemConceptual graph of the pulse ejection system. The scent intensity is controlled by two parameters: ejection quantity per unit time (EQUT) and ejection time (ET). Ejection can be controlled in pulses of 667 μs. Compared to existing measurement techniques, this system can minimize lingering scent trails and makes it more difficult for the olfactory system to adapt to a particular odorBack to article page