Background Information: Sound travels through waves, which are created by the vibration of an object which causes the air surrounding it to vibrate. These waves are unique to each sound you hear meaning they Will have different patterns of vibration. As the speaker vibrates from emitting the music, the surrounding molecules vibrate as well in the same unique pattern affecting the e growth of the bacteria in a specific way (http://www. Medically. Com/audio/01/ soundless. HTML). Although bacteria lack the ability to hear music, it is still able to feel the changes in birr actions and can grow differently from that (http://www. Education. Com/scientific/article/inconsiderateness’s/ ). When bacteria are placed in an environment where the nutrients that are needed for growth are provided, the bacteria will increase in size and population as it goes through its phases of gar with. There are four phases of bacterial growth: Lag Phase(growth slow at first), Log Phase(sat arts multiplying exponentially), Stationary Phase(growth stops and stabilizes), and Death Phases e(toxic waste builds up, food is gone, and cells die) (http://www. Britannica. Mom/Upchucked/topic/48203/bacteria/272364/ Growthofbacterialpopul action). In Germany, there is a sewage treatment plant that has tested this very idea. They used the ability of Mozart music to motivate microbes in their treatment facility hoping g to drive down energy costs. It has also been tested whether sound stimuli affects the growth f other living organisms. Their results prove that sound actually does affect the cell metal list (http://lymph. Spiegel. De/international/zeitgeist/ symphonicsewagewastetreatmentplantplaysm ozarttomicrobesa698040. HTML). In many other tests similar to that Of this one, some people have found that music does accelerate the growth of bacteria. Now it is our TU Brief Summary: This project will analyze the effects of different types of music on the growth of bacteria. The experiment will use 3 different genres of music as well as a control of no music c to compare the bacterial growth amongst the four samples. Even though bacteria can’t hear t he music, it is still able to feel the vibrations the music cause and that may be the changing fact or.
Conducting this experiment could help to figure out better ways to process sewage and other bacterial issues by testing to determine which genre may increase or decrease the growth of back terra. It will also determine whether the loud movement of students through school hallways will affect the growth of bacteria on water fountains, lockers, or other highly common areas. The re sluts could also help determine when more students get sick whether it’s during the school ye r or summer school.
Materials ; 2 or more prepared Petri dishes with agar ; Sterilized swabs ; Rubber or plastic gloves ; 2 or more portable CD or MPH players (used pods) ; Several pairs of cheap headphones, NOT airbeds (same number as music pal years) ; Several songs or albums of various music, the more diverse the better (such a s classical, hard rock, and pop) ; Camera ; Notepad and paper Procedure 1. Wearing gloves, prepare the Petri dishes. Use sterilized swabs to collect bacterial samples, then swipe swab against agar in Petri dish. Close and seal the dish and label the samples.
Place samples in warm, out of the way place. Leave one sample alone as the c intro. 3. Place headphones snugly around the dish. 4. Connect the headphones to the music player. 5. Play a different song per sample on repeat for each player. 6. Let samples grow for a week. Keep music players charged and playing at all times or for a specific time frame. Make sure to take pictures everyday. 7. Take off headphones and compare each sample at the end of the week. Take notes and measure the growth. 8. Carefully dispose of the Petri dishes after all data is collected. Analyze the data Data and Results
The results from this experiment, which were collected over a week’s period o f time, were quite different than what was first expected. As the hypothesis previously stated, the e expected outcome for the most growth was thought to be the pop music sample. However the re us Its showed that the control had the most growth out of all of the samples, but out of the music splayed samples classical had the most growth. Originally it was thought that pop music would grow the most because of its positive and upbeat rhythm. Except the data only shows that the bacteria was only an expansion of bacteria in the dish rather than in growth.