Masking of complex sound-technical notes for realization of constant signal-noise-ratio

Author(s): Curio, I.

Journal/Book: Percept Mot Skills. 1999; 89: PO Box 9229, Missoula, MT 59807, USA. Perceptual Motor Skills. 137-144.

Abstract: Based an findings regarding unconscious semantic information-processing for meaningful Visual stimuli, this paper describes a standardized procedure for the construction of constant signal to noise ratio for the masking of complex sounds. The proposed algorithm is derived from psychoacoustical laws concerning frequency and time-weighting of sound. Spectral characteristics are taken into account by mixing signal and white noise within frequency ranges defined through critical bandwidth (''narrow-band masking''). Furthermore, time-weighting is taken into account using sound-pressure patterns generated through low pass filters which follow the international specification DIN IEC 651 which provides specification for sound-level meters. Hardware and software circuits are described in detail. This proposal overcomes recognized lack of standardized methods in studies addressing unconscious semantic processing of auditory stimuli.

Note: Article Ott R, Univ Bonn, Inst Psychol, Romerstr 164, D-53117 Bonn, GERMANY

Keyword(s): AUDITORY SUBLIMINAL STIMULATION; MEMORY

Zurück | Weiter