(Color online) Average voice range profile for 10 females (after Gramming, 1988 ).
(Color online) Successive “yea” utterances with changing group size, (a) raw microphone signal, (b)calculated energy levels in dB with short (50 ms) window, (c) calculated energy level in dB with long (word length) window.
(Color online) Successive “yea” utterances with individuals in group 2 (light bars) changing loudness one-by-one, (a) getting louder, (b) getting softer.
(Color online) Relative sound energy level for four repetitions of five words, aye, nay, no, yea, and yes.
(Color online) Increase of sound level with an increasing group size and variation of individual sound power, (a) random Gaussian fluctuation with ±5 dB standard deviation, (b) a single speaker speaking 10 dB louder.
Number of judgments from five judges for control stimuli.
Number of judgments from five judges in experiment 1.
Number of judgments from five judges in experiment 2.
Number of judgments from five judges in experiment 3.
Number of judges (N = 5) × 10 pairs (N = 50 word pairs).
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