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. 2012 Feb 3;2(1):e000506. doi: 10.1136/bmjopen-2011-000506

Figure 3.

Figure 3

Preliminary data suggest a difference in spectral analysis between children with and without wheeze. Short-time Fourier Transform analysis was used to visualise spectrograms of a normal control (A) and asthmatic child with active wheeze (B). Representative sample is from preliminary recordings taken from the Emergency Room at the Johns Hopkins Hospital in Baltimore, Maryland.