Speech voices of persons speaking in a usual room or making announcements at a station of the Japanese National Railways were recorded by means of a condenser microphone of a precision sounds level meter and a tape recorder. The output from the tape was converted to digital values using an A-D converter and its frequency spectrum was obtained through the Fourrier method by the Facom 230-60 computer.
The formant structures of speech voices were found to be gained by the spectral analysis, if the sound pressure level of the speech exceeded that of the background noise by more than about 20-30dB. The analytical procedure thus proved to be useful for evaluation of the quality of speech used for interpersonal machine-aided communication.

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A trial was performed to make two dimensional expression (x-y plain) of heart rate; in a series of the pulse intervals an interval and the next one can be taken as x and y axies, respectively. The point P (x, y) may indicate the various characteristics of heart rate such as bradycardia, tachycardia, extrasystole, defficency, bigeminal and trigeminal pulses, and so on. In addition the time recorded the data and pulse rate may also be represented by this method at the same time.

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In Japan, the personal impression plays an important part in social activity, replacing the person's signature.
This paper is a first report on pattern recognition of seal impression.
There are some differences in their use and many kinds and shapes of ideographs are used. Taking such a situation into consideration, the theme of verifying the seal impression is studied from a standpoint of pattern recognition.
These seal verifications have usually been carried out by visual perception, in the same way that a personal signature is verified.
The process of this case is set up on a model basis and the possibility of pattern recognition is pursued.

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It was found that the “single-channel” hypothesis was powerful as the hypothesis to explain PRP phenomenon in RT, but it was pointed out for the relationship between ISI and RT₂ predicted by this hypothesis not to conform to the data. It was suggested that the relationship between ISI and RT₂ predicted by the “feedback” effect added to the “single-channel” hypothesis was found to be the curve of the so-called “saw tooth” pattern, and, therefore, the curve was similar to the data. The purpose of this study was to try to detect the curve of the so-called “saw tooth” pattern in the relationship between ISI and RT₂. 11 values of ISI (the minimum value 70msec., the maximum value 2080msec.) was used, and the curve of the so-called “saw tooth” pattern which involved local peaks at 3 points was detected.

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