A way of 可视化 声音 that provides 信息 about the 频率 that make up the 声音

The 水平 轴 of the 频谱图 displays 时间 the further to the right the further along in 时间 you are

While the vertical 轴 displays the 相对 频率 the 较高 the 图像（描绘） appears on the 频谱图 then the 较高 in 音高 it is

The stronger the colour then the 更响 the 声音

创作 your own Spectrograms

There are many 自由 频谱图 程序 available One good 例如 is the programme Raven made by researchers at Cornell University