title: The Influence of High-Frequency Envelope Information on Low-Frequency Vowel Identification in Noise.
abstract: Vowel identification in noise using consonant-vowel-consonant (CVC) logatomes was used to investigate a possible interplay of speech information from different frequency regions. It was hypothesized that the periodicity conveyed by the temporal envelope of a high frequency stimulus can enhance the use of the information carried by auditory channels in the low-frequency region that share the same periodicity. It was further hypothesized that this acts as a strobe-like mechanism and would increase the signal-to-noise ratio for the voiced parts of the CVCs. In a first experiment, different high-frequency cues were provided to test this hypothesis, whereas a second experiment examined more closely the role of amplitude modulations and intact phase information within the high-frequency region (4-8 kHz). CVCs were either natural or vocoded speech (both limited to a low-pass cutoff-frequency of 2.5 kHz) and were presented in stationary 3-kHz low-pass filtered masking noise. The experimental results did not support the hypothesized use of periodicity information for aiding low-frequency perception.
authors.affiliation: Medizinische Physik and Cluster of Excellence Hearing4all, Universität Oldenburg, Oldenburg, Germany.
authors.forename: Wiebke
authors.initials: W
authors.lastname: Schubotz
authors.affiliation: Medizinische Physik and Cluster of Excellence Hearing4all, Universität Oldenburg, Oldenburg, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Brand
authors.affiliation: Medizinische Physik and Cluster of Excellence Hearing4all, Universität Oldenburg, Oldenburg, Germany.
authors.forename: Birger
authors.initials: B
authors.lastname: Kollmeier
authors.affiliation: Medizinische Physik and Cluster of Excellence Hearing4all, Universität Oldenburg, Oldenburg, Germany.
authors.forename: Stephan D
authors.initials: SD
authors.lastname: Ewert
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D003463:Cues; D005260:Female; D006801:Humans; D008297:Male; D009622:Noise; D010470:Perceptual Masking / Q000502:physiology; D010700:Phonetics; D010898:Pitch Perception / Q000502:physiology*; D011897:Random Allocation; D013061:Speech Acoustics; D013063:Speech Discrimination Tests; D013065:Speech Intelligibility / Q000502:physiology*; D014831:Voice