Patients with single-sided deafness (SSD) often experience difficulty in determining the direction of sounds due to the head shadow effect, which limits their ability to localize sound sources. In noisy or open environments, this can result in missing crucial auditory warnings.Building upon the author’s 2025 study, Sound Direction Assist Device for Patients with Single-Sided Deafness Caused by Acoustic Neuroma [1], this research presents systematic improvements and a more intelligent, user-friendly design. The key enhancements include: 1. Upgraded voice recognition module: Added specific word recognition to identify nearby human voices and provide real-time verbal alerts to the user. 2. Integration of millimeter-wave radar: Radar sensing extends the detection range up to 40 meters—approximately 2.67 times greater than the previous version. 3. Optimized alert mechanism: A pressure sensor detects frowning responses to replace continuous vibration, reducing sensory fatigue and offering a more natural and comfortable interaction. By integrating acoustic, radar, and speech-recognition technologies, this study develops a more comprehensive environmental awareness system de