title: Equal autophonic level curves under different room acoustics conditions.
abstract: The indirect auditory feedback from one's own voice arises from sound reflections at the room boundaries or from sound reinforcement systems. The relative variations of indirect auditory feedback are quantified through room acoustic parameters such as the room gain and the voice support, rather than the reverberation time. Fourteen subjects matched the loudness level of their own voice (the autophonic level) to that of a constant and external reference sound, under different synthesized room acoustics conditions. The matching voice levels are used to build a set of equal autophonic level curves. These curves give an indication of the amount of variation in voice level induced by the acoustic environment as a consequence of the sidetone compensation or Lombard effect. In the range of typical rooms for speech, the variations in overall voice level that result in a constant autophonic level are on the order of 2 dB, and more than 3 dB in the 4 kHz octave band. By comparison of these curves with previous studies, it is shown that talkers use acoustic cues other than loudness to adjust their voices when speaking in different rooms.
authors.affiliation: Acoustic Technology, Department of Electrical Engineering, Technical University of Denmark, Kongens Lyngby DK-2800, Denmark. dpg@elektro.dtu.dk
authors.forename: David
authors.initials: D
authors.lastname: Pelegrín-García
authors.forename: Oier
authors.initials: O
authors.lastname: Fuentes-Mendizábal
authors.forename: Jonas
authors.initials: J
authors.lastname: Brunskog
authors.forename: Cheol-Ho
authors.initials: CH
authors.lastname: Jeong
mesh_terms: D000161:Acoustic Stimulation; D000162:Acoustics; D000223:Adaptation, Psychological; D000328:Adult; D000704:Analysis of Variance; D001307:Auditory Perception; D003463:Cues; D005160:Facility Design and Construction; D056228:Feedback, Sensory; D005260:Female; D006801:Humans; D008144:Loudness Perception; D008297:Male; D013018:Sound Spectrography; D013061:Speech Acoustics; D014732:Vibration; D014831:Voice; D055815:Young Adult