השוואת שיטות

	סולמות ברק וּמֶל	בהירות דיבור
תחום	אקוסטיקה	אקוסטיקה
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1937	1980
הוגה השיטה	Eberhard Zwicker, Stanley Smith Stevens	Herman Steeneken, Tammo Houtgast
סוג	Perceptual frequency mapping	Speech clarity assessment method
מקור מכונן	Zwicker, E. (1961). Subdivision of the audible frequency range into critical bands. Journal of the Acoustical Society of America, 33(2), 248–248.	Steeneken, H. J., & Houtgast, T. (1980). A physical method for measuring speech-transmission quality. Journal of the Acoustical Society of America, 67(1), 318–326.
כינויים	bark scale, mel scale, critical bandwidth, perceptual frequency	intelligibility metrics, STI, Speech Transmission Index, clarity index
קשורות	5	5
תקציר	Bark and Mel scales are perceptual frequency scales that map physical frequency (Hz) to perceived pitch and auditory perception. Formalized by Zwicker (Bark, 1961) and Stevens (Mel, 1937), these non-linear scales reflect how the human ear processes sound. Bark scale divides hearing into 24 critical bands; Mel scale models pitch perception. Both are essential for audio feature extraction, speech processing, and designing audio systems that align with human hearing.	Speech intelligibility is a quantitative measure of how well listeners understand spoken content in acoustic environments. Formalized by Steeneken and Houtgast in 1980 with the Speech Transmission Index (STI), intelligibility metrics combine room acoustic parameters (RT60, noise, clarity) to predict listener comprehension. Understanding speech intelligibility is essential for designing classrooms, offices, hearing aids, and public address systems where clear communication is critical.