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In this paper, we present a noise‐robust pitch extraction method in which air‐conducted (AC) speech and bone‐conducted (BC) speech are utilized simultaneously as the input signals. Due to noise independency in both the input signals and noise suppression effect in BC speech, peak characteristics created in different functions are significantly enhanced so that accurate pitch extraction is achieved even in highly noisy environments. Experimental results show a superior performance of the proposed method relative to the state‐of‐the art method in several types of noises. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC. [ABSTRACT FROM AUTHOR]

In this paper, we present a methodology to synthesize bone‐conduced (BC) speech. Without relying on commonly used techniques for speech synthesis, we consider to transform air‐conducted (AC) speech into BC speech. An infinite impulse response (IIR) filter is explored for the transformation. From the concept of system identification, the least squares (LS) method is employed and the IIR filter is designed through the recorded AC and BC speech data. By experiments, it is shown that the BC speech synthesis method is satisfactory. Filter model, order selection and stability in the methodology are discussed and noise‐robustness gained by the BC speech synthesis is also investigated. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC. [ABSTRACT FROM AUTHOR]