- Lubell Labs
- Offers underwater acoustic transducers, diver recall systems, synchronized swimming sound systems, amplifiers, analog and digital recorders, wired and wireless microphones, sound reproduction equipment, and complete air and underwater sound systems.
- Massa Products Corporation
- Offers design and manufacture of electroacoustic products for ultrasonic sensing in air and for underwater commercial oceanographic sonar applications.
- Ormal Electronics Limited
- Designs and manufactures special purpose copper and optical fibre cables for oem clients, working from initial concept, through feasibility demonstration, to design for manufacture.
- Tibbetts Industries
- Designs and manufactures of miniature electro-acoustic transducers and magnetic telecoils.
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