US 11,988,123 B1
Sound attenuator apparatus and method
Phillip M. Adams, Afton, WY (US)
Filed by Phillip M. Adams, Afton, WY (US)
Filed on Jan. 9, 2023, as Appl. No. 18/094,819.
Application 18/094,819 is a division of application No. 16/677,405, filed on Nov. 7, 2019, granted, now 11,549,414.
This patent is subject to a terminal disclaimer.
Int. Cl. F01N 1/08 (2006.01); F01N 1/00 (2006.01)
CPC F01N 1/08 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method of reducing amplitude of a sound originally released from an event, the amplitude having a maximum value at a time and location of the event, the method comprising:
passing sound waves, characterized by the amplitude as a function of time, generated by the event at the location, and traveling at the speed of sound through a gas, into a plurality of channels, each channel thereof having a unique length and being individually isolated against fluid communication from the remainder of the plurality;
transmitting the sound waves through the gas in each channel for an elapsed time corresponding to the unique length of that channel divided by the speed of sound in the gas;
reducing the amplitude to a reduced value through avoiding superposition of the waveforms of sound waves from the channels by discharging the sound waves from each channel sequentially, based on the elapsed time uniquely corresponding to each channel.