Voice changers are innovative tools that modify the pitch, timbre, or tone of a user's voice, offering a range of audio effects for various applications such as entertainment, professional use, and privacy. They employ advanced algorithms to transform voice recordings, allowing for both subtle and dramatic changes, including gender or age alterations and the addition of sound effects. Modern AI voice changers, like those developed by ElevenLabs, enhance these capabilities by providing natural-sounding, high-quality modulations that preserve emotional integrity. Voice changers are categorized into hardware-based and software-based types, with the latter being more versatile and accessible on multiple platforms, including Windows, Mac, iOS, and Android. Common uses span gaming, live streaming, audio production, and accessibility enhancements, while ethical considerations emphasize avoiding misuse for deception or illegal activities. The future of voice changers is poised for further advancements through AI and machine learning, potentially integrating with VR, AR, and voice cloning technologies to expand their impact on digital communication and entertainment.