Have you experienced a condition when listening to a very loud music makes your heartbeat so fast that you can actually feel the heavy beating? From this experience, we can conclude that loud and fast music 1 the heart rate. Therefore, we have a feeling of high 2 and stress when we listen to loud and fast music. On the contrary, soft music is 3 to a slower heart rate. People who listen to relaxing music have a slower heart rate, 4 to those listening to loud and fast music, or those not listening to music at all.
But why does this happen? Experiments found that the 5 of music on the heart is based on the functioning of the brain. When we hear music, the sound waves are translated into electrical impulses(神经冲动) by the 6. As it is related to the increasing and decreasing of the heart rate, the related effect is produced. Now, is it that only 7 music brings out this effect? Well, listening to soft or relaxing music is surely more 8. However, listening to any type of music you like can be 9, rather than not listening to any music at all.
It is believed that people who have a slower heart rate have a longer life. 10, people having a faster heart rate are at a greater 11 of suffering from cardiovascular(心血管的) diseases. Therefore, having a slower heart rate makes you live a longer and healthier life. When 12 slows down the heart rate, it brings about a feeling of 13. Therefore, it is used as a 13 technique. We can conclude by saying that the phrase "Music heals(治疗) the heart" is not just a saying, but a(n) 15!
（）33. A. selflessness B. helplessness C. calmness D. sadness
