Abstract

Front-back reversals (FBRs) often occur in laboratory experiments. Stimulus complexity, especially for high-frequency sounds, and head motion significantly reduce FBRs, so that in the everyday world FBRs probably do not often influence sound source localization. There is a small literature suggesting that listeners “expectancies” (based on experience or other sensory inputs) for where sound sources might be also affect FBRs. Low-pass noises that produce a large number of FBRs and a high-pass noise that does not were used. Listeners indicated the location of sound sources on the azimuth plane. The study aimed to investigate FBRs and not sound source localization accuracy. Two conditions were tested: 1) A “pitch cue” was correlated with the front-back location of the sound source (Cueing Conditions), and 2) Listener were told to expect the sound to be presented from only in front or only in back (Expectation Conditions). When listeners knew the correlation in the Cueing Condition and the front-back expectations in the Expectation Conditions, the number of FBRs were substantially reduced.

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