42 Services in the field of science and technology and research and development related thereto, namely, in particular in the field of electroacoustics and sensors and semiconductor and MEMS technology; industrial analysis and research, namely, in particular in the field of electroacoustics and sensors and semiconductor and MEMS technology; design and development of apparatus for recording, transmission or reproduction of sound or images; design and development of audio systems for mobile applications based on MEMS and CMOS technology, namely, in particular audio loudspeakers, microphones, digital audio players, audio receivers and sound recorders; design and development of loudspeakers, wireless loudspeakers, in particular featuring a data interface with short-range radio transmission, microphones, players, sound receiving apparatus, sound recording apparatus; design and development of mobile telephones, smartphones, tablets, laptops, computers, earphones, headphones, cabinets for loudspeakers, headphones, in-ear headphones and wireless headphones, in particular featuring a data interface with short-range radio transmission; design and development of combinations for headphones and microphones, namely, in particular headphones and spectacles with integrated microphones; design and development of electronic and acoustic individual and system components for integration in the aforesaid equipment, namely, in particular acoustic transformers, audio loudspeakers, microphones, MEMS motors, actors, sensors, acoustic membranes, electronic circuit cards, electronic circuit boards, integrated electronic circuits, acoustic amplifiers, acoustic conduits, acoustic couplers, acoustic alarms and ASICS; design and development of acoustic transformer systems, namely, in particular electroacoustic and electric transformers; design and development of microsystems (MEMS), namely, in particular of MEMS apparatus for the recording, transmission or reproduction of sound or image, MEMS acoustic transformers, MEMS sensors, MEMS actuators and acoustic MEMS membranes; design and development of MEMS loudspeakers and MEMS microphones; design and development of microphones and loudspeakers made with CMOS technology; design and development of MEMS actuators and MEMS acoustic membranes; design and development of spectacles, sunglasses, AR glasses, VR glasses, spectacles featuring an audio function, spectacles featuring wireless audio components, in particular featuring a data interface with short-range radio transmission, and spectacles with integrated loudspeakers; design and development of microphones and wireless transmission and reception components; design and development of audio apparatus, mobile audio apparatus, electronic audio apparatus and audiovisual apparatus; software design and software development, in particular for the control and improvement of audio equipment sound quality; design and development of chargers, portable chargers, in particular for portable audio apparatus; design and development of spectacle cases, in particular featuring integrated chargers