Magnetic Recording of Acoustic Data on Audiofrequency Tape (Classic Reprint)

Download or read book Magnetic Recording of Acoustic Data on Audiofrequency Tape (Classic Reprint) written by Edwin D. Burnett and published by Forgotten Books. This book was released on 2017-10-28 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Magnetic Recording of Acoustic Data on Audiofrequency Tape Also recently available is a low - noise, low-print tape, which has the same nominal characteristics as low-noise tape, except for five db less print-through. This is an excellent tape for speech, where there may be silent portions where print-through is particularly obvious. This would also be our tape of choice where long-term storage is contemplated. With a two-channel tape recorder in good adjustment, a signal-to noise ratio of 60 db, with an input signal level of +6 vu, should be available with low-noise tapes. On a single-channel full - width record ing, the corresponding signal-to-noise ratio should be 65 db. It should however, be pointed out that these figures are for the ratio between a particular level of a single frequency recorded on the tape, and the noise in a quiet, unrecorded portion of the tape. Actually, accompanying each signal recorded on the tape there is another noise that is difficult to evaluate, called the modulation noise This noise is a fixed per centage of the signal level, usually approaching one percent of the sig nal amplitude about 40 db below the signal level). This noise is well above the level of the residual noise on a tape that has been passed through the recording process with no signal applied. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.