这类工具本质上不是转换器，而是从零生成特定频率信号的“生成器”。适合音响工程师、音频爱好者、失眠人群和冥想群体。
: Beyond the built-in presets (174Hz, 396Hz, 528Hz, etc.), users can define custom target frequencies up to two decimal places. audio frequency converter apk link
– Extremely low frequencies at high volumes can damage phone speakers. Use the volume controls gradually when exploring the extremes of the frequency range. audio frequency converter apk link