Java: audio recording (sound cleaning from noise)?

Question

Java

The task arose in Java under the conditions of a shit-microphone to implement sound recording (conversation), as a result I have a huge amount of noise that needs to be cleaned.
Has anyone already solved a similar problem?
PS You need to solve only from Java, third-party programs are not suitable, I know about them.

Answer 1

DSP ?
PS. Just in case, Google - Java Noise Reduction