earticle

영어

In today's mechanized society, low frequency noises are ubiquitous. Though much research has been conducted on the effects of low frequency sound waves on human health and emotion, little research has been conducted on their impact on plants and bacteria. This research sought to determine the effects of low frequency noise on soil bacteria and E. coli. Initially, changes in growth and amounts of both bacteria under low frequency noise were measured, but no significant and definite alterations in the E. coli growth were observed. Then, the resistance of bacteria was tested by adding hydrogen peroxide, which yield harmful reactive oxygen species, to the soil bacteria and E. coli solutions, of which some were exposed to LFN (low frequency noise) while other control groups were not. The results showed that the bacterial solutions exposed to LFN were less affected by the hydrogen peroxide, indicating that LFN may have induced the secretion of chemical compounds, such as Superoxide dismutase that react with the reactive oxygen species to create new harmless compounds. It has therefore been concluded that LFN may strengthen the resistance of bacteria, and that certain measures, especially for harmful bacteria, should be taken in order to prevent increased resistance.