A hand-powered projectile assembly is provided for launching projectiles. Sound pressure detection section detects a sound pressure of a sound present in the second sound field picked up by the microphone of the second sound field, other than a sound reproduced by the speaker of the first sound field. The femtocell can be reconfigured in real time either remotely from a network operations center or the femtocell can be configured to automatically detect changing usage patterns and to automatically reconfigure the SDRs.