声频频率计
sonic frequency cymometer
声频频谱记录仪
sonic frequency spectrum recording meter
声频频谱仪
audio-frequency spectrometer
MPEG-4高级声频编码抽样率
MPEG-4 advanced audio coding scalable sampling rate
TGSD-50型声频振动取样钻机
TGSD-50 sonic drilling coring rig
变声频雷送
variable audio-frequency radiosonde
变压器耦合声频放大器
audio frequency amplifier
transformer coupled
不失真声频压缩
lossless audio compression