1. A system, comprising: a sensor network; and re-programmable and/or reconfigurable analog circuitry configured to monitor data collected by the sensor network, transform the collected data via one or more layers of processing into a space where defined wakeup events are separated from noise and other events, and selectively generate a wakeup signal in response to a defined wakeup event detected by the sensor network indicating that the collected data is associated with amplitude modulation in a speech band, wherein the defined wakeup event is programmable, after the system is deployed, by receipt of a wireless signal associated with switch and/or bias information.