Patent ID: 9671278
Date: 2017-06-06
CPC Classifications: E03D,G01H

Claim:
1. A method for detecting toilet flushing in a toilet bowl, the method utilizing a mechanically resonant frequency selective technique capable of adapting to variations in a noise-producing spectrum, wherein the detecting method comprises the steps of: providing an apparatus having an electrical circuit adapted to select a specific frequency in a spectral distribution of frequencies received from a piezoelectric accelerometer device, which piezoelectric accelerometer device includes the following elements sequentially layered in register and in interfacial contact: affixing at least the convex surface of the bowl shaped shell to forcibly hold said outer convex surface in contact with a surface of a part of the toilet bowl during the detection of toilet flushing; and, during toilet flushing, passing signals from the piezoelectric accelerometer device to the electrical circuit which processes said signals.