flying_walrus
Experienced
in radio (and i’m extrapolating, sonar or audible sound) you need several radiators and a computer controller to do beamforming. basically you need to set different radiators to interfere with/reinforce each other to send the beam in the direction you want.That triggered something in my mind. What about beamforming?
...plus, in my understanding, this technique is widely employed in sonar devices, and maybe that's good news becase I think that's an area where Cliff has a worked before...
beamforming a narrow band radio frequency signal requires an array of antennae tuned to that frequency. a lot of recent wifi routers do this with 4 or 6 omnidirectional antennae, but we’re talking about very small frequency bands (2412 to 2484 mhz and 5035 to 5864 mhz) so it’s easy to get antennae that are flat across this spectrum. since it’s basically impossible to get speaker drivers that are flat across the audio spectrum (20-20,000 hz) and even harder to get omnidirectional drivers...
even if you just wanted to beam form in one direction, you’d need an array of at least 4 to 6 coaxial FRFR drivers, all pointing in the same direction. imagine a circle of Atomic CLRs in a 6 foot tall, six foot wide cabinet. i don’t know about you, but i can think of a lot better uses for $6k
someone is going to bring up the apple homepod, which is a tiny but almost omnidirectional speaker. do any of us know what its frequency response is?
Last edited: