Ambient noise attenuation produced by one HDA earphone, two DD450... | Download Scientific Diagram
![Specifications - Sennheiser HDA 280 Specifications [Page 3] | ManualsLib](https://data2.manualslib.com/first-image/i4/16/1509/150829/sennheiser-hda-280.jpg "Specifications - Sennheiser HDA 280 Specifications [Page 3] | ManualsLib")
Specifications - Sennheiser HDA 280 Specifications [Page 3] | ManualsLib
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