Method for acoustic imaging by angle beam

A method for acoustic imaging by angle beam, the method generating an internal image of a test piece, the test piece having a first surface and a second surface, the method for acoustic imaging by angle beam comprises:

• (a) generating a sound wave via a transducer;
• (b) coupling the sound wave to the test piece at an angle to the first surface of the test piece via a physically continuous path, the angle being such that the sound wave progresses into said test piece along vectors angled to said first surface and said second surface and along said test piece via a plurality of sound reflections reflecting between said first surface and said second surface at points progressing away from the transducer location, said angle also being such that the sound reflections at said first surface produce energy at said first surface such that a first part of every reflection of the plurality of sound reflections continues through said first surface in the form of a wave through a media toward a CCD acoustic imaging camera, while a second part of every reflection of the plurality of sound reflections reflects from said first surface toward said second surface and continues along in said test piece;
• (c) focusing the waves that continue through said first surface to an imaging area in the CCD acoustic imaging camera;
• and
• (d) transforming said waves focused to the imaging area to a video output via said CCD acoustic imaging camera such that said video output displays an internal volume image of said test piece.