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. 2010 May 4;10(5):4622–4633. doi: 10.3390/s100504622

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© 2010 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 3. — (a) Spectrogram of the original traditional microphone speech; (b) Spectrogram of the original radar sensor speech; (c) Spectrogram of the enhanced traditional microphone speech; (d) Spectrogram of the enhanced radar sensor speech.

Figure 3. — (a) Spectrogram of the original traditional microphone speech; (b) Spectrogram of the original radar sensor speech; (c) Spectrogram of the enhanced traditional microphone speech; (d) Spectrogram of the enhanced radar sensor speech.