Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductors; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices.; Signal processors for audio speakers; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids