Tell me more.

When we talk about scalability, we mean that it is relatively easy to go from a few sensors to a large number of sensors.

Smartphones are mass-produced, commercially available, small, lightweight, battery-powered, and familiar to most people.

You can transport them, deploy them, start them, stop them, recharge them, and redeploy them without a complicated logistics chain.

We saw this directly in our experiments.

In one campaign, we were able to deploy around 30 smartphones in about one hour and then redeploy them during pauses in the experiment.

That allowed us to sample many different locations over several days.

So are there any privacy or surveillance tool concerns with using smartphones for large-scale acoustic sensing?