Method and systems for acoustic cleaning

A tone generator assembly comprising:

• a resonance chamber comprising a first end and a second end and a body extending therebetween, said body surrounding a cavity therein, said first end comprising a resonance chamber opening in flow communication with the cavity, wherein said resonance chamber cavity comprises a bore through said resonance chamber body;
• and
• a nozzle comprising a bore therethrough, said bore comprising an inlet opening configured to receive a flow of relatively high pressure fluid and an outlet opening coupled in flow communication with said inlet opening configured to discharge an underexpanded jet of fluid when the flow of relatively high pressure fluid is received at the inlet opening,
• wherein said resonance chamber and said nozzle are positioned relatively and sized to facilitate emitting a tone from said tone generator assembly having a frequency less than two kilohertz and tuned to a frequency determined to provide a cleaning vibratory energy.