Comfort Validation
A validation test was conducted to ensure the comfort of the device. A ranking system from 1 to 4 was created, with 1 being the least comfortable and 4 being the most comfortable. Ten different test subjects asked to lay on the device and rank the comfort based on this system. The device was repositioned into all three positions for each test subject and the comfort was asked to be ranked for each. The acceptance criteria for the comfort test required an average comfort score of 3. The device passed the comfort validation for the left, right, and upright position, with an average score of 3.60, 3.60, and 3.80, respectively.
Pneumatic Verification
The pneumatic verification test used a ranking system to determine how well the pneumatic system moved the user into the desired position. Lower scores indicate a lack of meeting the desired position with higher scores indicating successful movement into the desired position; the acceptance criteria is an average score of 3 or above.
The left and right sides met the acceptance criteria
The upright position did not meet the acceptance criteria
Loudness Verification
The loudness verification test measured the decibel noise produced from the air pumps during usage. The distance away of the air pump and muffled system from the location of where the head will be is varied. The desired decibel reading is 40 dB
The desired sound level was not reached but the noise level was able to be minimized by about 35% from the initial noise level without the muffling apparatus, to an average of 51.58 dB.
Pressure Sensor Verification
The pressure sensor verification test measured the voltage out for six different weights measured in grams. The graph shows a line for each of the five trials as the weight applied to the pressure sensor increases. The dotted black line on the graph shows the average of the five trials which follow a logarithmic curve.
Power Supply Validation
A validation test for the power supply was conducted to ensure that the device will be powered successfully when the user plugs the device into the wall. As long as the wall outlet is working properly, the device will be powered.