Sniffing speeds up chemical detection by controlling air-flows near sensors

Abstract Most mammals sniff to detect odors, but little is known how the periodic inhale and exhale that make up a helps improve odor detection. In this combined experimental theoretical study, we use fluid mechanics machine olfaction rationalize benefits of sniffing at different rates. We design build bellows sensor system change in current as function concentration. A fast enables quick recognition, too makes amplitude signal comparable noise. slow increases delays its transmission. This trade-off may inspire future devices can actively modulate their frequency according odors.