Norman J. Lass
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Listeners' identification of environmental sounds Open
The purpose of this investigation was to determine if listeners can accurately identify various environmental sounds. A total of 40 sounds were recorded: (a) 20 animal sounds from four cows, cats, dogs, pigs, and sheep; (b) 12 inanimate so…
An investigation of speaker height and weight identification: II. Direct estimations Open
Results of a previous investigation [N.J. Lass and M. Davies, J. Acoust. Soc. Am. 60, 700–703 (1976)], in which subjects were given a multiple-choice response task for their judgments, indicated that listeners were capable of identifying t…
Preliminary investigation of speaker height and weight identification Open
The purpose of this investigation was to determine if listeners were capable of speaker height and weight identification from recorded speech samples of speakers' voices. A standard prose passage was recorded by 30 speakers, 15 females and…
A preliminary investigation of speaker photograph identification Open
The purpose of this investigation was to determine if listeners were capable of speaker photograph identification from recorded samples of speakers' voices. A standard prose passage was recorded by 30 speakers, 15 females and 15 males. A m…
A Non-Verbal Analog to the Verbal Transformation Effect Open
The verbal transformation effect, the phenomenon in which continued listening to recorded repetitions of a stimulus produces perceptual illusory changes in normal listeners, has been elicited by a variety of speech stimuli, including isola…
The Verbal Transformation Effect: A Comparative Study of the Verbal Transformations of Phonetically Trained and Nonphonetically Trained Listeners Open
Continued listening to recorded repetitions of a stimulus has been found to produce perceptual illusory changes in normal listeners. This phenomenon was labeled by Warren [Brit. J. Psychol. 52, 249–258 (1961)] as the verbal transformation …
A Normative Study of Listening-Rate Preferences of Adults Open
A paired comparison procedure was employed to determine the listening-rate preferences of 100 adult subjects. The recording of a standard prose passage was time altered by means of a speech compressor to yield nine reading rates: 100, 125,…
The Use of Isolated Vowels as Auditory Stimuli in Eliciting the <i>Verbal Transformation Effect</i>. Open
The purpose of this investigation was to determine the effectiveness of single isolated vowels as auditory stimuli in eliciting perceptual illusory changes in subjects, a phenomenon referred to by Warren [Brit. J. Psychol. 52, 249–258 (196…
Effects of Frequency, Intensity, and Vowel-Type Variations on Maximum Phonation Time Open
Forty adult subjects, 20 males and 20 females, performed 14 maximum phonation time tasks: sustained phonations of /a/ using soft, moderate, and loud intensity levels at the 25th, 50th, and 75th percentile points in the subject's pitch rang…
Temporal Patterns of Rate Alterations in Oral Reading Open
The purpose of this investigation was to determine if there exists a typical temporal pattern or set of patterns employed by speakers in their attempts to increase and decrease their normal oral reading rates. Twelve subjects read a standa…