Acoustic drying system with sound outlet channel

An acoustic wave drying system for drying a material, comprising:

• an airflow source;
• an acoustic resonant chamber that directs acoustic energy onto the material, including:
• an air inlet for receiving air from the airflow source;
• an air outlet;
• a primary air channel having side surfaces connecting the air inlet and the air outlet, the primary air channel having a primary air channel length between the air inlet and the air outlet;
• a closed-end resonant chamber formed into a first side surface of the primary air channel, the closed-end resonant chamber having side surfaces and a resonant chamber length;
• and
• a sound air channel having a sound air channel inlet on a second side surface of the primary air channel opposite to the closed-end resonant chamber and a sound air channel outlet for directing an air impingement airstream containing acoustic energy onto the material, the material being spaced apart from the sound air channel outlet by a gap distance, the sound air channel having a sound air channel length between the sound air channel inlet and the sound air channel outlet;
• wherein a first fraction of the air received from the airflow source is directed out of the pneumatic transducer through the air outlet and a second fraction of the air received from the airflow source is directed out of the pneumatic transducer through the sound air channel outlet as the air impingement airstream.