| implement(noun, technology, device, gadget, acoustics) |
| instrument(noun, technology, device, gadget, acoustics) |
| invention(noun, technology, device, gadget, acoustics) |
| listening(noun, technology, device, gadget, acoustics) |
| machine(noun, technology, device, gadget, acoustics) |
| mechanism(noun, technology, device, gadget, acoustics) |
| music listening(expression, technology, device, gadget, acoustics) |
| piece of equipment(expression, technology, device, gadget, acoustics) |
| stereo(noun, technology, device, gadget, acoustics) |
| stereo system(expression, technology, device, gadget, acoustics) |
| telecommunication(noun, technology, device, gadget, acoustics) |
| telephony(noun, technology, device, gadget, acoustics) |
| thermoacoustic technology(expression, technology, device, gadget, acoustics) |
| tool(noun, technology, device, gadget, acoustics) |
| transducer technology(expression, technology, device, gadget, acoustics) |
| utensil(noun, technology, device, gadget, acoustics) |
| electro-acoustic transducer(noun, expression, technology, sound, science) |
| acoustics(noun, technology, sound, science, audio) |
| audibility(noun, technology, sound, science, audio) |
| auditory range(expression, technology, sound, science, audio) |