开心果 在 2004-4-7 13:22:36 发表的内容
输入功率一样的1千赫兹和2千赫兹的信号，如果输出也只有1千赫兹和2千赫兹的声音信号，但声功率不一样，这就是线性失真；如果只输入1千赫兹的信号，但输出的声音信号中除了1千赫兹的信号外，还有2千赫兹、3千赫兹、4千赫兹...........等声音信号，这就是非线性失真。它们都对音质有不利的影响。 |
Not quite agree.
The first one you mention is the amplitute issue. That means the frequency
response is not ruler flat, and this is not linear distortion.
The second comment is harmonic distortion because when there is only
1K Hz fq input, but following with 2K,3K and 4K Hz output that shouldn't
exist.
When we say linear distortion, means,
1. When we inject a pure sine wave into the speaker, the sine wave show
unbalance on positive and negative half cycle. or
2. The speaker cone, when push and pull inward and outward, the cone,
if under big power drive to it's extreme, then the speaker would
becomes non-linear and we may call it linear distortion.
