Abstract :
The spectroscopic method, a simple yet highly effective technique for visual analysis of speech sounds, has been developed by the National Bureau of Standards (NBS). The Bureau is conducting an investigation of the many problems involved in recording and reproducing human speech. The present program is the outgrowth of assistance which the Bureau rendered the Library of Congress in improving the quality of “talking books,” voice recordings of selected literature which the Library supplies to the blind. In addition to performance studies of recording and reproducing equipment, new and improved methods of tests were worked out, and new types of recording media were investigated. In the course of this work, the spectroscopic technique was developed.
