Complex multisource sound induces greater neurodegeneration in neonatal rat brain than single-source sound

Identical musical noise caused substantially more neurodegeneration in the developing brain when delivered as complex wave interference from multiple speakers rather than as a single-source sound of the same intensity. Complex multisource waveforms appear to amplify the harmful effects of noise on neonatal brain tissue, likely through interference-driven pressure fluctuations. These findings have clinical and public health implications, suggesting that current noise exposure guidelines should consider not only sound intensity and duration but also the acoustic complexity and source configuration, especially to protect vulnerable populations such as infants and children from high-intensity multisource noise environments.