Kay instrumentation and software are used for acoustic analysis by forensics specialists worldwide. Police departments, intelligence services, and private investigators have the need to analyze, edit, and enhance signals which may be a human voice or other acoustic events of interest. The Computerized Speech Lab (CSL) and several software options are the tools of choice for many of these forensic specialists requiring a highly versatile hardware/software platform.
The classic spectrogram is one of the key methods for analyzing and comparing acoustic data such as voice samples. CSL provides excellent versatility with selectable sampling frequencies, multiple filter bandwidths, and adjustable dynamic range to provide the most revealing displays possible. Complementing spectrography are LPC analysis for formant extraction, fundamental frequency (with user-editable period marking when signals are noisy), spectral analysis, and more.
Editing and enhancement utilities are also primary tools used by the acoustic forensics community. Very often, these specialists receive tapes which are of poor quality because they were collected amidst street noise or from a wiretapped recording. To “clean up” signals contaminated with background noise, the CSL family includes an option, Model 5142, which is a powerful editing/enhancement program designed specifically to subtract interference and noise in speech and other audio signals while maintaining the maximum possible integrity of the signal of interest. A multi-band digital equalizer, adaptive inverse filtering, and tonal noise elimination are a sampling of the enhancement capabilities provided.
To obtain a product flier on the Acoustic Forensics Package, contact the company or your local representative (international customers).