RODE NT-USB Manual De Instrucciones página 13

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room sound, and will reduce the proximity effect (increased bass or
low frequency response when the sound source is very close)
Experimentation should be made with the angle from which the
microphone is addressed, as different results can be achieved when
the vocalist is 'off-axis' to the microphone (and the gold dot).
Diagram 4 - Positioning the NT-USB for vocals