Headphones; earphones; audiometers for non-medical use; electronic sound amplifiers; electronic sound amplifiers for use in and together with earphones; electronic sound amplifiers for use in and together with earphones with noise control, noise suppression, impulse noise suppression and intelligent adaptive hearing protection circuitry to filer, subdue or control undesirable noise or sounds and to allow two-way communication in noisy and stressful environments; two-way or multi-directional communication microphones, earphones and headsets with noise control, noise suppression, impulse noise suppression and intelligent adaptive hearing protection circuitry to filter, subdue or control undesirable noise or sounds and to allow two-way communication in noisy and stressful environments; electronic headsets; electronic noise suppression headsets; electronic headsets with impulse noise protection and suppression; electronic headsets with intelligent adaptive hearing protection circuitry; two-way radios and wireless communicators for use in industrial, mining and construction environments, fire and rescue and law enforcement activities, motor sports and racing, shooting sports and hunting activities, aviation and helicopter environments, in noisy aircraft, watercraft and vehicle environments, and in highly stressful, noisy and difficult environments

Hearing aids; noise suppression hearing aids; impulse noise protection hearing aids; audiometers for medical use; intelligent adaptive hearing aids and speech assistance communications devices for use in industrial, mining and construction environments, fire and rescue and law enforcement activities, motor sports and racing, shooting sports and hunting activities, aviation and helicopter environments, in noisy aircraft, watercraft and vehicle environments, and in highly stressful, noisy and difficult environments

Education and training services, namely providing educational classes, seminars, group and individual training on intelligent, adaptive hearing and communication techniques in industrial, mining and construction environments, fire and rescue and law enforcement activities, motor sports and racing, shooting sports and hunting activities, aviation and helicopter environments, in noisy aircraft, watercraft and vehicle environments, and in highly stressful, noisy and difficult environments; providing educational classes, seminars and conferences, and training services in the field of audiology, hearing devices, electronic amplification and filtering devices, microphones, digital active noise reduction and filtering, and digital and analog signal processing techniques