I saw the mosquito device that will annoy younger people, but not older people: http://www.compoundsecurity.co.uk/teenage_control_products.html Its pretty expensive. How would I begin to create that from scratch? Can a sound-card generate those frequencies? I imagine I would need a special speaker. How about an amp?, does that also need to transmit the higher freqs.? Is it like going from a bass amp to a guitar amp? (and I need to keep going?) Whats good software in linux to generate certain frequencies? thanks for any ideas, -- paul w
