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Acoustical analysis of maternal sounds during the second stage of labor
B F Fuller1, J E Roberts, S McKay
1University of Colorado School of Nursing, Denver 80262.
Experienced obstetric nurse and midwives indicate they can differentiate among sounds indicating that a woman is (a) beginning to manifest the effort to bear down, (b) experiencing pain, or (c) frightened. This study examined the acoustical properties of work/effort, childlike, and out-of-control utterances to determine whether their acoustical properties differed. Out-of-control utterances are more tense but contain similar levels of shimmer and pitch as childlike utterances. Work/effort utterances are higher pitched and more tense than childlike utterances. Work/effort utterances contain more shimmer but have similar levels of pitch and tenseness as out-of-control utterances.
Experienced obstetric nurse and midwives indicate they can differentiate among sounds indicating that a woman is (a) beginning to manifest the effort to bear down, (b) experiencing pain, or (c) frightened. This study examined the acoustical properties of work/effort, childlike, and out-of-control utterances to determine whether their acoustical properties differed. Out-of-control utterances are more tense but contain similar levels of shimmer and pitch as childlike utterances. Work/effort utterances are higher pitched and more tense than childlike utterances. Work/effort utterances contain more shimmer but have similar levels of pitch and tenseness as out-of-control utterances.