The 4104 Commentator’s Noise Cancelling Ribbon Microphone is of British Broadcasting (BBC) design and used for reproducing high quality commentary speech from noisy surroundings by cancelling out a considerable degree of background noise.
The 4104 has a proven reliable performance capability, being since its introduction used by such broadcasting networks as the BBC, IBA, CBS and ABC.
The 4104 is not unduly affected by wind noise and can be used in air stream velocities up to 20 mph (32 km) without notable difference in speech quality. With the use of a simple windshield attachment good quality speech reproduction can also be achieved in winds ranging up to 40 mph (64 km) or more.
Importantly the polar response is effectively bi-directional allowing one or more commentators to make clear individual commentary close side by side without interference from mutual cross over talk.
This microphone is generally regarded as the leader in its field. Wherever it is essential to single out a speaker's voice without transmitting background noise, this is the choice of buyers from all over the world.
One example application is its use in sports reporting, selecting the spoken commentary and cutting out the roar of racing cars at Brands Hatch or the screams of the little old ladies in the ringside seats at wrestling contests. News reporters broadcasting eyewitness accounts of processions and street demonstrations have also depended on this type of microphone.
Equally important is its application in noisy industrial environments; prompt information and explicit instruction may be matters of life and death in a shunting yard or rolling mill, and a noise-cancelling microphone of this quality is the most vital element in such communications.
Specifications
Features
Better than 30 dB average discrimination between voice and background
noise.
Provides speech of broadcast quality completely free from breath
noises.
Flat frequency response at the controlled talking distance.
4104 Noise Cancelling
Corrugated aluminium ribbon protected by fine woven nylon gauze
Ribbon
Low mass damped ribbon to control transient response
Polar Response
Bi-directional
Frequency Response
60 Hz to 12,000 Hz
All microphones factory tested in free field conditions
Impedance
300 ohm
Sensitivity
-50 db W.R.T. IV/Pa
Equivalent Electro-magnetic hum pick up
Less than 0.0002 dynes/cm² equivalent acoustic input for
1 milligaus at 50 c/s
Distortion
Less than 1% at 120 dB SPL
Connection
By means of an XLR 3 pin plug - Pin 1 screen - Pin 2 positive
- Pin 3 negative
Body Housing
Brass perforated case with stainless nose and mouth screens,
pvc covered handle designed to provide a natural holding position
for long periods
Dimensions
8" (200 mm) long x 2¼" (57 mm) wide x 3"
(76 mm) deep.
Weight
10 oz (283 g).
Finish
Body brown enamel paint with pvc covered handle.
Packaging
Each microphone comes in a foam lined rigid plastic carrying
case for safe keeping.
Accessories
Replacement washable plastic hygiene screen, packed in 10's
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