Strong results from Nvidia (NASDAQ:NVDA) are propelling other artificial intelligence (AI) stocks higher, including SoundHound AI (NASDAQ:SOUN) stock.SoundHound specializes in voice AI applications. But its shares have been falling of late, from almost $9 each in March to barely $3.50 in late April. SOUN stock was up nearly 4% in the pre-market this morning. The shares opened at $5.18 each, a market capitalization of $1.7 billion.However, the rally might be shortlived, or at least unstable, as SOUN stock is ...