9 Downloadable software for testing and measuring analog and digital signals; downloadable software for the conversion of data to electronic media, namely, downloadable software for the conversion of analog and digital signals; downloadable applications using artificial intelligence for testing and measuring analog and digital signals; downloadable software using artificial intelligence, namely, downloadable software using semantic technologies for audio collection; electronic test and measurement devices for use in the field of audio engineering, namely, instrumentation used to test and measure analog and digital audio signals; electronic test equipment for audio frequency signals; electronic test equipment for analog and digital signals; electronic equipment for the measurement and analysis of audio signals, namely, audio analyzers; electronic equipment for the generation and production of audio signals, namely, switches, amplifier filters, cables, and sense resistors; electronic testing equipment, namely, sound level meters, pistonphones in the nature of audio analyzers; audio equipment for vehicles, namely, electronic test measurement systems for testing audio signals for automotive, locomotive, and aerospace audio systems and parts therefor; electronic testing equipment for testing audio signals for vehicles for electronic test measurement systems for automotive, locomotive, and aerospace systems; in-flight testing equipment for gathering data during the flight of an aircraft; apparatus for vehicle testing, namely, apparatus for testing aerospace structure and components for gathering data during the flight of an aircraft; apparatus for bridge testing, namely, apparatus for oscillation, thermal, sound, and noise measurement; electric sensors, namely, sensors for measuring vehicle performance; strain gauges; strain gauges, namely, strain gauges for the structural analysis of vehicles and buildings; microphones, namely, multichannel microphones, microphones for testing, calibrating, and measuring audio signals; microphone cables; microphone cartridges; microphone stands; electronic training simulators, namely, headsets, headphones and earbuds; electronic training simulators and parts therefor, namely, ear simulators, mouth simulators for training of acoustical devices; hardware, namely, computer controlled apparatus for testing and measuring audio signals, power modules for audio frequency testing, and acoustic test chambers for audio frequency testing