The Soundbeam Tower is a defensive structure that attacks by firing sonic waves at enemies. It is best suited to counter ground creatures as it deals very little damage to flying enemies and does not attack Henchmen or structures at all. The Soundbeam Tower is able to detect camouflaged and digging enemies.

In addition to dealing constant damage, a single Tower will slow down a creature it is attacking by 5% unless it has High Endurance, and this effect can stack up to 25% using multiple Towers. Insect Invasion introduced the Sonic Boom, a single powerful attack for the Tower that damages all enemy creatures in a radius around it. However, Sonic Boom costs 1000 electricity and takes a long time to recharge.

In the Campaign, Soundbeam Towers can only be built after Lucy has researched them in Mission 3.