||Pillow Shape Design to Enhance the Sleep Quality of Middle-Aged Groups
||Department of Industrial Design
There are many ways to measure sleep quality, in which sleep disruptive events are included. To improve sleep quality, it is important to reduce sleep disruptive events such as snoring, apnea, and neck pain resulting to waking symptoms. Few pillow studies have been researched on reducing snoring, relieving neck pains, and enhancing comfort at the same time. Thus the purpose of this papers is to investigate the relationship between pillow shapes and reducing snoring, preventing neck pains, as well as comfort so as to improve sleep quality.
3 anti-snore and neck-pain-relieving pillows and 1 conventional polyester pillow are chosen to be respectively tested for 3 nights on the relationship between the pillows' shapes and the subjects’ sleep quality. One male and one female, who are 40 to 60 years old, participated in this experiment. The sound of snoring was recorded, and the head and neck’s pressure was recorded by a pressure mat during the whole night. This study used Jawbone to test the subjects’ objective sleep quality. After subjects woke up, the subjective evaluation scale of neck pain were filled out to show the subjects’ neck pains condition. Then, I formed a morphological chart based on literature review and used the data got from the pressure mat accompanying with a focus group to determine a pillow design to enhance the sleep quality of middle-aged groups.
After the pillow design was built up, I conducted a 6 nights’ experiment for 6 persons respectively to evaluate the product, with a method same as the previous experiment. Then, according to the data gained from a series of experiments, we could analyze and find out the design’s pros and cons, which nevertheless would provide guidelines for researcher to determine a pillow revision furthermore.
This study investigated the sleep quality of particular users and new-designed pillow shape to enhance the sleep quality of middle-aged groups as better as possible, and in the meantime, to verify the characteristics and features of pillows which could improve sleep quality.
TABLE OF CONTENTS iv
LIST OF TABLES viii
LIST OF FIGURES x
LIST OF SYMBOLS AND ABBREVIATIONS xii
CHAPTER 1 INTRODUCTION 1
1.1 Background 1
1.2 Motivation 3
1.3 Purpose 3
1.4 Research Field 3
1.5 Research Structure And Process 4
CHAPTER 2 LITERATURE REVIEW 5
2.1 The Classification of Snoring 5
2.2 The Cause of Snoring 5
2.3 The Positional Effect on Snoring 6
2.4 Bony prominence of the head 8
2.5 Interface pressure and bony prominence 9
2.6 Neck pain 9
2.7 Present pillow types 10
2.7.1 Pillow with neck support 11
2.7.2 Shoulder support pillow 11
2.7.3 Other present pillows 13
2.8 Pillow design parameters 15
2.8.1 Material 15
2.8.2 Size 16
CHAPTER 3 METHOD 17
3.1 The Outline of Experiment 17
3.1.1 Experimental Framework 18
3.2 Experiment 1: pretest of four pillow types 19
3.2.1 The Purpose and Process of Experiment 19
3.2.2 Experiment Participants 19
3.2.3 Experimental Execution 19
3.2.4 The Subjective Evaluation 21
3.3 Design development: Focus group 21
3.3.1 Design Guideline 21
3.3.2 The initial morphological chart 22
3.3.3 The process of focus group 22
3.4 Experiment 2: The Evaluation of pillow design 23
3.4.1 The Purpose and Process of Experiment 23
3.4.2 Experiment Participants 23
3.4.3 Experimental Execution 23
3.4.4 The Subjective Evaluation 25
CHAPTER 4 DESIGN DEVELOPMENT 26
4.1 The result and design development in focus group 26
4.1.1 The results of the focus group 26
4.1.2 The final pillow design 29
CHAPTER 5 RESULT 31
5.1 The result of the pretest 31
5.1.1 The pressure distribution overlapping 31
5.1.2 Objective sleep quality 34
5.2 The result of the posttest 35
5.2.1 Objective sleep quality 35
5.2.2 Interface pressure 37
5.2.3 Neck pain degree 38
5.2.4 Postural changing 38
5.2.5 Pressure distribution 39
CHAPTER 6 DISCUSSION 41
6.1 Pretest 41
6.1.1 The head’s sleep position observation 41
6.1.2 The objective sleep quality 42
6.2 Final pillow design 43
6.3 Posttest 43
6.3.1 Objective sleep quality 43
6.3.2 Interface pressure and postural changing 44
6.3.3 The degree of neck pain 45
CHAPTER 7 CONCLUSION 46
Appendix A Neck pain subjective evaluation scale 53
Appendix B The design of Snoring Counting Arduino System 54
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