Investigating the Influence of Familiarity in a Three-Dimensional Soundscape of Multisensory Factors Shaping Fetal Perception

Abstract

The ability of human fetuses to recognize their mother's voice was studied in this research.  Sixty full-term fetuses were randomly divided into two groups: those who were read a taped recording by their mothers or those who were read the same recording by a female stranger. Unfortunately, our in-depth acoustic research showed no discernible difference beyond a fleeting shadow in the here and now. To explore the duration spent moving across all intervals, the frequency of movements in each temporal realm, and the epoch at which the very first movement occurred, we employed the powerful tool of repeated measures analysis of variance (ANOVA) in the name of scientific research. A peaceful calm pervaded the delicate balance of information, creating an air of mystery. Experience has shown to influence fetal sound processing since different behaviors have been discovered in reaction to familiar and unfamiliar sounds. It lends credence to the idea that there is some interplay between the genetic expression of brain development and the experience of a given species, which is central to the epigenetic model of speech perception. The speaker is roughly 10 centimeters above the mother's belly, and the average sound pressure level (SPL) is 95 dB. No stimulation, no sound (from mother or stranger), and no stimulation lasts two minutes. The fetal heart rate increases for 4 minutes when the mother's voice is present, while the fetal heart rate lowers for 4 minutes when an unfamiliar voice is present. Our investigations, however, went far beyond the domain of pulsations and reverberations. We looked at the period beginning five seconds before the onset of sound and continuing for another five seconds to reevaluate the complex dance of fetal movement.