Effect of spectral overlap on the echo suppression threshold for single reflection conditions.
In performing arts venues, the spectra of direct and reflected sound at a receiving location differ, due to seat dip effect, diffusive and absorptive surfaces, and source directivity. This paper examines the influence of differing lead and lag spectral contents on echo suppression threshold. The results indicate, that for a highpass filtered direct sound and a broadband reflection, attenuation of low frequencies initially results in an increase in echo suppression threshold, while for higher cutoff frequencies echo suppression threshold drastically decreases. For broadband direct sound and filtered reflections, the echo suppression threshold is inversely related to high frequency content.
Audiovisual Communications Laboratory, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland. andreas.walther@epfl.ch
Andreas
A
Walther
Philip
P
Robinson
Olli
O
Santala
D000161:Acoustic Stimulation; D000162:Acoustics; D001302:Audiometry, Speech; D001307:Auditory Perception; D001309:Auditory Threshold; D005160:Facility Design and Construction; D005260:Female; D006801:Humans; D009038:Motion; D009622:Noise / Q000009:adverse effects; D010470:Perceptual Masking; D011312:Pressure; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013017:Sound Localization; D013018:Sound Spectrography; D013067:Speech Perception; D013997:Time Factors; D014732:Vibration