Abstract
This is a brief presentation of my scientific career with outlooks on the development of speech research in the last 50 years. It started with an electrical engineering thesis at KTH in 1944–1945. The topic was intelligibility loss as a function of bandwidth reduction in telephony and related problems in assessing the effects of various types of hearing loss. In 1945–1948 I was employed by the Ericsson Telephone Company where I conducted basic studies of the spectral characteristics of Swedish speech sounds. This early period and my two years at MIT, 1949–1951, provided an entry to a pioneering era of speech research with new tools for speech analysis and synthesis and speech production modeling. It was during this time I started my work on the acoustic theory of speech production and established my cooperation with the linguists Roman Jakobson and Morris Halle and with Ken Stevens. I have followed the advent and the progress of speech research through the analog, the digital, and the computer age. Speech research now has the challenge to provide a deeper and more integrated understanding of all levels of the speech communication process. This is the ultimate requirement for the realization of advanced applications.
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