The Computerized Speech Lab suite of software covers speech analysis, teaching, research, voice measurement, clinical feedback, acoustic phonetics, and forensic work. KayPENTAX, a division of PENTAX medical, offers two CSL models, 4500 and 4150B. The latest generation CSL hardware, is an input/output recording device for a PC.
CSL, is an integrated hardware and software product, and as such offers input signal-to-noise performance typically 20-30 dB superior to generic, plug-in sound cards.
Crevier-Buchman, L; Laccourreye, O; Papon, JF; Monfrais-Pfauwadel, MC; Brasnu, D (1996). "[Contribution and limits of acoustic analysis of the voice and alaryngeal speech with a computerized system]". Ann Otolaryngol Chir Cervicofac. 113: 61–8. PMID8999745.