+**9db** represents a nine-[Decibel](/wiki/Decibel) change, a logarithmic unit indicating relative power or intensity. It signifies a noticeable shift, often perceived as a significant increase in [Audio](/wiki/Audio) levels or signal strength in communications. This measure quantifies a precise, impactful difference.
+## See also
+- [Sound](/wiki/Sound)
+- [Signal](/wiki/Signal)
+- [Gain](/wiki/Gain)
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