Noise-Reduction Anticipation Circuits
The use of an additional microphone to provide an anticipation signal to operate noise-reduction circuits is described, the anticipation microphone being placed ahead of the signal microphone by sufficient distance so that the noise-reduction element in a modulator is fully opened to permit recording of the maximum signal amplitude. In rerecording a special hill-and-dale record is made of the last rehearsal. This record is then played back during the take, the output being fed to the noise-reduction circuit and anticipation being accomplished by moving the needle ahead on the disk by an appropriate distance.
- Print ISSN
- 0097-5834
- Published
- 1944-11
- Content type
- Original Research
- DOI
- 10.5594/J12879
Download the PDF
or become a SMPTE member today to access the
article.
Become a SMPTE
member today to access the article.