Tuning a sound profile of a muffler

A muffler comprising:

• a housing that includes a coupling chamber;
• a first inlet pipe having a first set of physical features, wherein the first inlet pipe opens into the coupling chamber to carry exhaust to the coupling chamber;
• a second inlet pipe having a second set of physical features, wherein the second inlet pipe carries exhaust to the coupling chamber;
• and
• an outlet pipe having a first end that opens into the coupling chamber to receive the exhaust from the coupling chamber, wherein the outlet pipe extends from the first end within the coupling chamber to a second end in an environment outside of the housing and that carries the exhaust from the coupling chamber to an environment outside of the housing;
• wherein the first set of physical features varies from the second set of physical features with respect to at least one physical feature such that a first sound waveform passing through the first inlet pipe and a second sound waveform passing through the second inlet pipe are uniquely tuned to thereby tune an overall sound waveform that passes through the outlet pipe.

A method for tuning inlet pipes of a muffler, the method comprising:

• forming a first inlet pipe that opens into a coupling chamber and carries exhaust to the coupling chamber within a housing of the muffler such that a first portion of the first inlet pipe has a first set of physical features;
• and
• forming a second inlet pipe that opens into the coupling chamber and carries exhaust to the coupling chamber such that a second portion of the second inlet pipe has a second set of physical features;
• and
• forming an outlet pipe having a first end that opens into the coupling chamber to receive the exhaust from the coupling chamber, wherein the outlet pipe extends from the first end within the coupling chamber to a second end in an environment outside of the housing,
• wherein the first set of physical features varies from the second set of physical features with respect to at least one physical feature to configure the first inlet pipe and the second inlet pipe such that a first sound waveform that passes through the first inlet pipe and a second sound waveform that passes through the second inlet pipe are uniquely tuned to thereby tune an overall sound waveform emitted by the muffler.