频响应测试信号
Here you can download four MP3 files that help you to evaluate the low frequency reproduction in your audio system. These signals are equally suitable for full-bandwidth monitors and subwoofer systems.
The signal that contains only one frequency is called a tone.
First of the test signals boink.mp3
is a collection of tones at individual frequencies. Each of them is 10 cycles long. The frequencies in this signal are 16, 18, 20, 22, 26, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 120 and 150Hz. There is a little space between the tones to enable your audio system to build up its forces. As you play this signal pay attention to the purity of the tone. The tone should be clean and all tones should have the same level. If you hear any distortion, noises or rattling check your sound system and your room. The source may be your loudspeakers but also something resonating in your listening room or even the audio equipment feeding the loudspeakers. This signal is particularly useful for testing the output capacity of your system because the signal is not continuous, stressing your audio system similar to actual music and yet the signal is analytical and well defined. Start from a low sound level and work up towards higher levels. Notice any changes.
