Sonocytology: the first study showing that cells emit sound
In 2000 Dr James Gimzewski, UCLA, California, published an article on his revolutionary discovery in the field of cellular function[i]. By using the atomic-force microscope, he was able to hear the sounds produced by the cells. The newly emerging science of sonocytology maps the pulsations emitted by the cell’s outer membrane, amplifies them and identifies sounds emitted by each cell, revealing that each cell in our body produces a unique sound and communicates it to the neighbour cells. It was found that yeast cells produce sound ranging from C sharp to D, and that genetically mutated cells produce slightly different sound. When alcohol was sprinkled on the cells killing them, their pitch would go up. Dead cells would produce low rumbling sound (possibly due to random atomic motions). It was also discovered that healthy cells emit slightly different sound to cancerous ones (as cancer seems to originate with the changes in the genetic makeup of the cells), potentially making sonocytology a powerful diagnosing tool in early cancer diagnosis and detection[ii].
[i] Joachim, C.; Gimzewski, J. K.; Aviram, A. (2000). “Electronics using hybrid-molecular and mono-molecular devices” (PDF). Nature 408 (6812): 541–8.doi:10.1038/35046000. PMID 11117734. 2,195 citations (Web of Science, October 2014