title: Speech intelligibility of the callsign acquisition test in a quiet environment.
abstract: This paper reports on preliminary experiments aimed at standardizing speech intelligibility of military Callsign Acquisition Test (CAT) using average power levels of callsign items measured by the Root Mean Square (RMS) and maximum power levels of callsign items (Peak). The results obtained indicate that at a minimum sound pressure level (SPL) of 10.57 dBHL, the CAT tests were more difficult than NU-6 (Northwestern University, Auditory Test No. 6) and CID-W22 (Central Institute for the Deaf, Test W-22). At the maximum SPL values, the CAT tests reveal more intelligibility than NU-6 and CID-W22. The CAT-Peak test attained 95% intelligibility as NU-6 at 27.5 dBHL, and with CID-W22, 92.4% intelligibility at 27 dBHL. The CAT-RMS achieved 90% intelligibility when compared with NU-6, and 87% intelligibility score when compared with CID-W22; all at 24 dBHL.
authors.affiliation: Institute for Human-Machine Studies, Department of Industrial & Systems Engineering, North Carolina A&T State University, Greensboro 27411, USA.
authors.forename: Misty
authors.initials: M
authors.lastname: Blue
authors.forename: Celestine A
authors.initials: CA
authors.lastname: Ntuen
authors.forename: Tomasz
authors.initials: T
authors.lastname: Letowski
mesh_terms: D000293:Adolescent; D000328:Adult; D001302:Audiometry, Speech / Q000379:methods*; D001307:Auditory Perception / Q000502:physiology; D001309:Auditory Threshold; D015331:Cohort Studies; D003936:Diagnosis, Computer-Assisted; D004777:Environment; D005260:Female; D006801:Humans; D008144:Loudness Perception; D008297:Male; D009622:Noise; D011336:Probability; D012680:Sensitivity and Specificity; D013065:Speech Intelligibility