Methodology
We use a Class 1
Bruel & Kjaer 2250-L G4 sound analyzer equipped with a Type 4955a microphone that features a weighted dynamic range of below 6 dBA and up to 110 dBA. All tests are conducted inside a hemi-anechoic chamber at 25–28 °C ambient, and the test subject is placed a meter from the sound analyzer.
Output Noise Comparison Graph
The following graphs show the output noise of the TerraMaster TD2 Plus and compare it to other NAS and DAS units we have tested in the past.