Audio Pixels (ASX:AKP) has announced it will receive an additional $1.5M from chairman Fred Bart's 4F Investments.

The new loan has a 12% interest rate, repayable from a future capital raise.

Audio Pixels says its a world leader in digital loudspeaker technologies by generating sound waves directly from a digital audio stream using micro-electromechanical structures (MEMS). 

Shares of Audio Pixels Holdings closed up 4% today.