Timbre Scaled Exhaust System

A timbre scaled internal combustion exhaust system comprising:

• an inlet collector including a single entrance duct at a first end of the collector in fluid communication with an exhaust flow from an internal combustion engine and an exit duct at a second end of the collector;
• a plurality of non-perforated parallel tuning tubes in fluid communication with the plurality of exit ducts of the inlet collector including
• at least a first tuning tube having a diameter, the diameter selected based on a first desired note and
• at least a second tuning tube having a second diameter that varies from the diameter of first tuning tube, the diameter of the second tuning tube selected based on a second desired note;
• an outlet collector including a plurality of entrance ducts in fluid communication with the at least first and second tuning tubes and a single exit duct in fluid communication with an outlet of the exhaust system;
• wherein the inlet collector splits the exhaust flow through the plurality of tuning tubes to create individual notes, and wherein the outlet collector combines the split exhaust flow to create a desired sound of internal combustion engine exhaust.

A timbre scaled internal combustion exhaust system comprising:

• an inlet collector including a single entrance duct at a first end of the collector in fluid communication with an exhaust flow from an internal combustion engine and an exit duct at a second end of the collector;
• a plurality of non-perforated parallel tuning tubes in fluid communication with the plurality of exit ducts of the inlet collector including
• at least a first tuning tube having a diameter, the diameter selected based on a first desired note and
• at least a second tuning tube having a second diameter that varies from the diameter of first tuning tube, the diameter of the second tuning tube selected based on a second desired note;
• an outlet collector including a plurality of entrance ducts in fluid communication with the at least first and second tuning tubes and a single exit duct in fluid communication with an outlet of the exhaust system;
• wherein the inlet collector splits the exhaust flow through the plurality of tuning tubes to create individual notes, and wherein the outlet collector combines the split exhaust flow to create a desired sound of internal combustion engine exhaust.