"If Bigfoot is actually proven to exist, the vocalizations on these tapes may well be of great anthropological value, being a unique observance of the bigfoot in his natural environment." - Professor R. Lynn Kirlin,Professor of Electrical Engineering, after a year-long university of Wyoming-based study of the Bigfoot Recordings.

In 1980, the University of British Columbia Press (Vancouver and London) published a book entitled:

At the time, Marjorie M. Halpin was curator of ethnology in the Museum of Anthropology and an assistant professor in the anthropology department at the University of British Columbia. Michael Ames was director of the Museum of Anthropology and a professor in the anthropology department at the University of British Columbia. In this book, there is an article, expanded from an earlier conference presentation, entitled:

written by Professor R. Lynn Kirlin and Lasse Hertel. This article includes, in addition to material presented the conference, data from Lasse Hertel, "An Application of Speech Processing Techniques to Recordings of Purported Bigfoot Vocalizations to Estimate Physical Parameters" (MS thesis, University of Wyoming, 1978). A brief summary from this paper is as follows:

"Having analyzed a taperecording of purported Bigfoot speech using accepted techniques of signal processing, the authors conclude that the means and ranges of the recorded pitch and estimated vocal tract length of the speakers indicate that the sounds were made by a creature with "vocal features corresponding to a larger physical size than man." They also conclude that the tape shows none of the expected signs of being prerecorded or rerecorded at an altered speed and hence diminish the probability of a hoax."

"The results indicate more than one speaker, one or more of which is of larger physical size than an average human adult male. The formant frequencies found were clearly lower than for human data, and their distribution does not indicate that they were a product of human vocalizations and tape speed alteration. Although a time-varying speed could possibly produce such formant distributions, an objective hearing and the articulation rate do not support that hypothesis."

"Statistical analysis was applied to groups of vocal tract estimates from different vocalizations, and a significant difference was found between the groups. When compared with human data the results indicated that there could possibly be three speakers, one of which is non-human. The average vocal tract length was found to be 20.2 cm. This is significantly longer than for a normal human male. Extrapolation of average estimators, using human proportions, gives height estimates of between 6'4" and 8'2"." - Professor R Lynn Kirlin and Lasse Hertel