A self-powered triboelectric auditory sensor (TAS) that could be used to build electronic auditory systems for external hearing aids in intelligent robotics applications has been developed by the engineers at Chongqing University. The auditory system is the most straightforward and efficient means of communication between human beings and robots. Ideally, robotic auditory systems should allow robots to listen to human instructions while also perceiving their vocal intonations, in order to respond accordingly. One of the key aims of social robotics is hence to design auditory sensors that are powerful and sensitive in a wide frequency range. These applications could also benefit 10 percent of the global population that have hearing impairments.