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  • Title: Voice segregation by difference in fundamental frequency: effect of masker type.
    Author: Deroche ML, Culling JF.
    Journal: J Acoust Soc Am; 2013 Nov; 134(5):EL465-70. PubMed ID: 24181992.
    Abstract:
    Speech reception thresholds were measured for a voice against two different maskers: Either two concurrent voices with the same fundamental frequency (F0) or a harmonic complex with the same long-term excitation pattern and broadband temporal envelope as the masking sentences (speech-modulated buzz). All sources had steady F0s. A difference in F0 of 2 or 8 semitones provided a 5-dB benefit for buzz maskers, whereas it provided a 3- and 8-dB benefit, respectively, for masking sentences. Whether intelligibility of a voice increases abruptly with small ΔF0s or gradually toward larger ΔF0s seems to depend on the nature of the masker.
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