Conference paper Open Access

AUDIBILITY OF COINCIDENCE DIPS AND STRUCTURAL RESONANCE DIPS IN ACOUSTIC ISOLATION CURVES

Léopold Kritly; Kristian Jambrosić; Monika Rychtáriková; Christ Glorieux

The audibility of coincidence dips and structural resonance dips in acoustic isolation curves of different types 
of walls is investigated. Measured and simulated wall transmission curves with varying dip magnitude and 
central frequency are emulated in listening tests  by  presenting  simulated sound on the receiving side of a 
wall, which  originates from sending realistic sound pressure level pink noise through  a  wall  and  by applying 
its  transmission curve as a filter. Differences in dip magnitude of 1.5dB and more are found to be audible. 
Shifting the central frequency of the dip from 400Hz to 500 Hz or from 1600Hz to 2500Hz is clearly audible.

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