This AI-powered security systems company still has room to grow. SoundHound AI (SOUN 0.40%) stock has rallied about 130% so far this year. The developer of audio and speech recognition tools impressed the bulls as it grew rapidly and attracted a new investment from Nvidia (NASDAQ: NVDA). SoundHound has carved out a niche in the AI market with two main platforms: its namesake app, which identifies songs from short audio clips, and Houndify, a platform that allows companies to develop their own speech recogni ...