Shimoda T, et al. – Here, lung sound analysis (LSA) was regulated at 7 points, in order to find out whether the technique could identify the location of airway inflammation in patients with asthma. For evaluating airway inflammation in bronchial asthma, expiration–to–inspiration sound pressure ratio (E/I) low frequency [LF] and E/I mid frequency [MF] were more useful LSA parameters. It was suggested that 7–point lung sound recordings could be used to identify sites of local airway inflammation.