amplify the sound meaning in English

放大声音
扩大音量

By turning this knob to the right you can amplify the sound from this radio
把这个旋扭向右转你就可以增大收音机的音量。
The signals are transformed into digital signals and sent to a computer . digital signal processing includes amplifying the sound signals , low - pass filtering , wavelet transform for de - noise and analyzing power spectra using matlab software . for different species of pests the acoustic characteristics are different in time domain and frequency domain
害虫声信号采集系统由日本产teac ；四通道录音机（数字记录仪）记录害虫爬行声信号，数字示波器将声信号转变为数字信号送计算机存储，由matlab软件对数据文件进行信号处理，包括信号的再现、放大、滤波、小波去噪、功率谱分析等工作。