This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Vectorized. The original can be viewed here: Acoustic filters.png: . Modifications made by Mike.lifeguard.

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• File:Acoustic_filters.png licensed with PD-self, PD-self/en
  • 2009-02-14T23:49:08Z Mike.lifeguard 2382x2022 (544296 Bytes) {{Information |Description={{en|1=6 examples of acoustic filters.}} |Source=Own work by uploader |Author=[[User:Mike.lifeguard|Mike.lifeguard]] |Date=~~~~~ |Permission= |other_versions= }} [[Category:Audiology]]

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