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

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

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