调频声 frequency-modulated sound

调频声呐 frequency modulated sonar

调频立体声 FM STEREO ; stereo FM

调频躁声 frequency-modulation noise

调频立体声广播 FM Stereo Broadcasting ; FM stereophonic broadcast ; FM Stereo

声频调制 audio modulation ; voice modulation

精确调整音频的声调 Parametric EQ

连续发射调频声纳 continuous transmission sonar

调频噪声 PM noise