11:15 AM - 11:30 AM
[HTT19-09] On Evaluation of Environmental Sound by Degree of Human Concentration
Keywords:Sound, Pollution, Brain waves
Currently, COVID-19 is changing the learning environment of students and the working environment of office workers. In this study, we focus on the environmental sound, clarify the difference in the environment of residential areas, which is different from schools, companies, educational districts and office areas, from the viewpoint of concentration. In this study, we clarify the factors that lead to comfort from the two points of deep psychology and physiological response. This result should be useful for future design. In the physiological response experiment, brain waves, which are closely related to concentration, were measured and analyzed.
Before conducting the psychological experiment, the environmental sounds used in the experiment were collected from the subjects as a preliminary survey, and the representative sounds were selected after grouping the environmental sounds. The subjects were shown a limited environmental sound and evaluated the degree to which they could concentrate in five stages. The average value of human speech was 2.89 indoors at home and 2.19 during university lectures. A possible cause for this is the difference in the recognition range of environmental sounds obtained from the preliminary survey, and the number of people who recognize human speech as environmental sounds is higher during university lectures. Furthermore, since it was confirmed from some environmental sounds that the results were divided into two, the cause was analyzed. In addition, as a result of considering the correlation of the average values, regularity was found.
Experiments on physiological reactions were performed using a simple electroencephalograph (EMOTIV EPOC X). EMOTIV EPOC X can measure β wave by dividing it into two types, High β and Low β, and this time, we measured α wave and Low β wave, which are considered to be particularly affected. In the experimental method, the subjects were asked to solve 12 simple arithmetic operations by mental arithmetic, and at that time, the subjects were asked to listen to the sound source created as a sound stimulus at the same time as each environmental sound. The brain waves at that time were measured and compared with psychological experiments for analysis. Comparing the data obtained from the electroencephalogram measurement with the data obtained from the psychological experiment, the four things that actually matched were the sound of turning paper, the clock, the chirping of birds, and the voice of a person. It was found that the most human voice among them hindered concentration.It was also found that the sound of turning paper and the chirping of clocks and birds are environmental sounds that do not interfere with concentration.
In this study, experiments were conducted from two directions: psychological experiments and physiological experiments. Although there was some discrepancy between the auditory image and the response from the sound stimulus, it was noticeable that human speech had an adverse effect on concentration. In this experiment, we fixed the space and let the subject listen to it, and considered the effect of only sound on concentration, but it is also necessary to investigate how changing the space affects concentration.
Before conducting the psychological experiment, the environmental sounds used in the experiment were collected from the subjects as a preliminary survey, and the representative sounds were selected after grouping the environmental sounds. The subjects were shown a limited environmental sound and evaluated the degree to which they could concentrate in five stages. The average value of human speech was 2.89 indoors at home and 2.19 during university lectures. A possible cause for this is the difference in the recognition range of environmental sounds obtained from the preliminary survey, and the number of people who recognize human speech as environmental sounds is higher during university lectures. Furthermore, since it was confirmed from some environmental sounds that the results were divided into two, the cause was analyzed. In addition, as a result of considering the correlation of the average values, regularity was found.
Experiments on physiological reactions were performed using a simple electroencephalograph (EMOTIV EPOC X). EMOTIV EPOC X can measure β wave by dividing it into two types, High β and Low β, and this time, we measured α wave and Low β wave, which are considered to be particularly affected. In the experimental method, the subjects were asked to solve 12 simple arithmetic operations by mental arithmetic, and at that time, the subjects were asked to listen to the sound source created as a sound stimulus at the same time as each environmental sound. The brain waves at that time were measured and compared with psychological experiments for analysis. Comparing the data obtained from the electroencephalogram measurement with the data obtained from the psychological experiment, the four things that actually matched were the sound of turning paper, the clock, the chirping of birds, and the voice of a person. It was found that the most human voice among them hindered concentration.It was also found that the sound of turning paper and the chirping of clocks and birds are environmental sounds that do not interfere with concentration.
In this study, experiments were conducted from two directions: psychological experiments and physiological experiments. Although there was some discrepancy between the auditory image and the response from the sound stimulus, it was noticeable that human speech had an adverse effect on concentration. In this experiment, we fixed the space and let the subject listen to it, and considered the effect of only sound on concentration, but it is also necessary to investigate how changing the space affects concentration.