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; electronic components in the nature of piezo MEMS for fluidic pump; consumer audio devices, namely, headphones, earbuds, and hearing aid devices; semiconductor chip sets for use in piezo MEMS fluidic pump; air quality sensors; air pumps for air quality sensors; microelectromechanical (MEMS) devices in the nature of piezoelectric transducers for applications in electronic or computer heat dissipation and micro-fluidic pumping; smartphones; tablets; virtual reality goggles; virtual reality glasses; virtual reality headsets; augmented reality goggles; augmented reality glasses; augmented reality headsets; laptop computers; solid-state drives; wireless chargers; 2D packaging; 2.5D packaging; 3D packaging; chip scale packages; flat panel displays; flat panel televisions; projectors; monitors; desktop computers; computer servers; video recording devices; 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