AKG Acoustics C 451 B manual Cleaning, Windscreen

4.5 Highpass Filter

Fig. 5: Highpass filter switch.

Refer to fig. 5 above.

5.1Microphone Body

5.2Windscreen

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4 Using Your Microphone

	Low-frequency rumble or
	wind noise such as air condi-
￿	tioning rumble, traffic noise,
	structure-borne noise, etc.
￿	that usually pass unnoticed
	may become a clearly audible
￿	nuisance on a recording.
	To minimize low-frequency
	noise, you can switch in the
	highpass filter. Depending on

the spectra of the wanted and unwanted signals, set the high- pass filter switch on the microphone shaft from flat (1) to a cor- ner frequency of 75 Hz (2) or 150 Hz (3). In either position, the slope of the filter is 12 dB/octave (1:4) downward.

5 Cleaning

•Use a soft cloth moistened with water to clean the surface of the microphone body .

•Wash the foam windscreen in soap suds. Do not use the windscreen before it has dried completely.

C 451 B