Voice print is one of the promising solutions for biometric applications by distinctive patterns of certain voice characteristics of an individual. Due to the nonintrusive and high-accuracy sensing nature, many researchers have shown considerable attention to human voice sensing through radio frequency (RF) technologies [e.g., Wi-Fi and millimeter wave (mmWave)] thereby realizing a set of emerging applications. It has become a remarkable research field over the past decade. In this article, we provide a comprehensive technological review of the current state-of-the-art of wireless technologies for human voice sensing. We perform a full analysis of voice print recognition connotations and applications and explore the principles of voice production. Human voice sensing technologies are divided into four modalities. In addition, we summarize the theory of wireless sensing and make an in-depth comparison of different RF technologies for human voice sensing. An overview of human voice sensing is proposed, and this article also highlights voice signal acquisition, signal preprocessing, feature extraction as well as prediction and recognition. Furthermore, this article presents a thorough survey of the current human voice sensing through RF technologies and compares them in detail. We discuss the hardware system architecture and classify various applications of wireless voice sensing. At the end of the article, we conclude the review with future directions and challenges associated with wireless human voice sensing.

中文翻译：

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通过射频技术进行人类语音传感：全面回顾

声纹是生物识别应用中最有前途的解决方案之一，它具有个人某些声音特征的独特模式。由于非侵入式和高精度传感的特性，许多研究人员对通过射频（RF）技术[例如Wi-Fi和毫米波（mmWave）]进行的人类语音传感表现出极大的关注，从而实现了一系列新兴应用。在过去的十年里，它已成为一个引人注目的研究领域。在本文中，我们对当前最先进的人类语音传感无线技术进行了全面的技术回顾。我们对声纹识别的内涵和应用进行了全面的分析，探索了声音产生的原理。人类语音传感技术分为四种模式。此外，我们总结了无线传感的理论，并对用于人类语音传感的不同射频技术进行了深入的比较。概述了人类语音传感，本文还重点介绍了语音信号采集、信号预处理、特征提取以及预测和识别。此外，本文还对当前通过射频技术进行的人类语音传感进行了全面调查，并对它们进行了详细比较。我们讨论硬件系统架构并对无线语音传感的各种应用进行分类。在文章的最后，我们总结了与无线人声传感相关的未来方向和挑战。