1. T. Ifukube, A cued tactile vocoder, Computers in Ading the Disabled, J. Raviv (ed), North-Holland Publishing Co., 1982, pp.197–215.
2. T. Ifukube, Design of a Voice Typewriter, CQ Publishing Co., (195 pages,in Japanese), 1984.
3. T. Ifukube, Signal processing for cochlear implants, S. Furui & M. M. Sondhi (ed), dvances inSpeech Processing, Marcel Dekker, inc., New York, 1992, pp.269–305.
4. T. Ifukube, Sound-based Assistive Technology for the Disabled, Corona Publishing Co., (250 pages. in Japanese) 1997.
5. T. Ifukube, Discrimination of synthetic vowels by using tactile vocoder and a comparison to that of an eight-channel cochlear implant, IEEE Trans., BME, Vol.36.No.l1, 1989,pp.1085–1091.