Sound wave testing device and method for testing solar panel

A sound wave testing device for testing a solar panel, comprising:

• at least one sound output unit, providing at least one first sound signal;
• at least one sound-collecting element, being disposed above the at least one sound output unit;
• at least one sound-receiving unit, being disposed at an end of the at least one sound-collecting element opposite the at least one sound output unit;
• and
• an isolating element, being disposed between the at least one sound output unit and the at least one sound-collecting element, and the solar panel is disposed on the isolating element;
• wherein the at least one first sound signal is transformed into at least one second sound signal while passing through the solar panel, the at least one second sound signal is then received by the at least one sound-collecting element and transmitted to the at least one sound-receiving unit, and the at least one second sound signal is then transformed by the at least one sound-receiving unit into at least one digital signal for output.