Abstract by Zachary Jones
Physics and Astronomy
Kent Gee, Scott Sommerfeldt
Noise-Reduction in Vacuum-Assisted Toilets
The noise from airplane vacuum-assisted toilets is often viewed as objectionable by passengers. Our research presents a way to reduce vacuum-assisted toilet volume levels. Our experimental setup consists of an airplane toilet connected to two large holding tanks evacuated by an industrial vacuum pump. It has been found that manipulating the tube geometry attached to the bowl can lead to significant noise reductions. When properly configured, an increasing bend radius and tube length between the bowl and flush valve has lead to a decrease of up to 20 decibels in the overall noise level. One constraint on the optimal solution that has also been investigated is that the prototype model needs to fit underneath the toilet envelope.