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(a) The spectrogram of the TIMIT sentence “Be careful not to plow over the flower beds.” (b) The segmentation of the sentence based on scaled-entropy, (c) RMS levels, and (d) sonorants/obstruents classification. The proportion coefficient in (b) was set to 60%. The sonorants and obstruents in (d) are indicated as levels of 1 and 0, respectively, and the dotted line indicates the silent regions at the beginning and end of the sentence.
