Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back The coding of acoustic signals and formation of their spectra images Rybochkin A.F., Pravednikova S.V. The article offers to carry out the analysis of acoustic signals by relative comparison of the intensive components received from narrow-band frequency filters which quantity is defined during research works. The acoustic signal amplifies with amplifier, then it arrives on narrow-band frequency filters. Intensive components from narrow-band frequency filters are detected, then they are compared on the block of comparators on which exits the codes reflecting spectra images (forms) or shift in number of N! are formed. At technical realisation with N narrow-band filters, as the information on exits of the block of comparators there are digit binary codes for which transfer in spectra images the general mathematical expression is resulted. The offered method of coding of acoustic signals allows to get rid from excessive selfdescriptiveness of spectral components which is present at usual spectral decomposition, it does not demand preliminary rationing, at technical realisation it is steady against hindrances and it is not critical to frequency characteristics of microphones and amplifiers. It is possible to use it for compression many digit binary codes in shifts which easy to translate again in binary codes. At the analysis of acoustic signals using their code messages there is a possibility of construction of cheaper diagnostic systems on recognition of conditions of diagnosed objects. The program developed for process automation counts shifts or levels of spectra images under the received code messages, and shows codes for the quantity set of spectra images levels. Key words: acoustic signals, narrow-band frequency filters, comparator, digit binary codes. Е-mail:Anat_ryboch@mail.ru