An exhaust muffler (1) invention includes an entry chamber (9), a
resonator chamber (15), and a baffle chamber (23) positioned in serial
order between an exhaust gas inlet (3) that lets exhaust gas into the
entry chamber and an exhaust gas outlet (5) from the baffle chamber that
lets the exhaust gas exit to the exterior. A pass-through tube (21)
provides an exhaust gas passage extending from the first entry chamber,
through the resonator chamber and into the baffle chamber; and a baffle
system (2,4,6, 8, 10, 12 & 14) located in the baffle chamber, contains a
plurality of baffles positioned between the resonator chamber at one end
and said exhaust gas outlet at the other end for reflecting sound
admitted into said baffle chamber via said pass-through tube, whereby
interference patterns of reflected sound are produced that lessen the
intensity of the sound that exits along with exhaust gas from said outlet
tube. In accordance with an additional aspect to the invention, the
resonator chamber is contiguous with the entry chamber on one side and
with said baffle chamber on an opposed side.