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When lavalier microphones are concealed under clothing, the clothing often scratches against the microphone. To minimize this problem, sound recordists sometimes wrap the head of the microphones in moleskin or place it inside a hollow-centered, column-shaped sponge and place it under a placard, behind a button, or within the knot of a tie.
The large size and weight of the RE20 requires a strong microphone stand or boom arm, and a very sturdy microphone clip or robust hanging yoke. The supplied mic clip (model number 320) is tightened securely with a knurled knob. An optional shock-mount is available for the RE20 family of microphones: the EV model 309A.
The camera uses a 1/2-inch colour Newvicon tube with a consumer-grade lens barrel giving a 6 times zoom with macro, normal focussing down to 4 feet (1.2 metres), and a minimum illumination of 10 lux. The microphone and folding viewfinder are physically built-in with no external cables, though headphones and an external microphone can used.
A pressure-gradient microphone uses a diaphragm that is at least partially open on both sides. The pressure difference between the two sides produces its directional characteristics. Other elements such as the external shape of the microphone and external devices such as interference tubes can also alter a microphone's directional response.
Røde's dynamic broadcast microphones have become widely used in podcasting, voice-over and radio production. [47] The company released its first dynamic live performance microphone, the M1, in 2008—promoted through the '$1 Mic campaign and supported by a lifetime warranty. [48] Røde also released the MI-S, which features a locking switch.
The XH A1 provides two channels of audio through the built-in microphone or via external XLR audio. In HDV mode the camera can record two 16-bit channels at a rate of 192 kbit/s and 1.5 Mbit/s in DV mode. The official web site states that (HDV standard): HDV: 2-channel recording MPEG1 Audio Layer II: (bit rate 384 kbit/s) In SD mode: