High-Quality Sound Recovery of Moving Sound Source Using Millimeter-Wave Radio

The emerging millimeter-wave microphones have garnered considerable attention in recent years due to their potential for sound detection in various applications, particularly in situations where traditional microphones may be impractical. However, despite their promise, there is a notable lack of evidence demonstrating high-quality sound recovery of moving sources, which remains a significant challenge in the field. This paper addresses this critical gap by proposing a novel method for displacement alignment that improves the detection and recovery of sound signals from moving sources. The proposed method works by first aligning the displacement of the sound source over time, which ensures that the signals are synchronized and avoids interference from movement of sources. Subsequently, precise surface vibrations are extracted from the aligned signals, providing data for sound recovery. A finite impulse response (FIR) filter is applied to remove low-frequency motion, which often interferes with the clarity of the detected sound. Experimental results demonstrate the method’s effectiveness in recovering high-quality sound from moving sources, offering a promising solution for advancing the emerging millimeter-wave microphone technology in real-world applications. This work could pave the way for more accurate and reliable sound detection systems, particularly in dynamic environments. Conflict of Interest Statement The authors declare no conflicts of interest.