Figure 1
Waveform and spectrum of the photoacoustic signals. (a) The waveform of a photoacoustic signal. (b) Time-frequency spectrum of the same signal. (c) Normalized power spectrum density of the signal.
Figure 1 | Scientific Reports
Waveform and spectrum of the photoacoustic signals. (a) The waveform of a photoacoustic signal. (b) Time-frequency spectrum of the same signal. (c) Normalized power spectrum density of the signal.
