Description
The 4115 Broadcaster's Noise Cancelling Ribbon Microphone is used for close indoor talking situations where good quality broadcasting and public address announcement speech is required to be reproduced in conditions with high background noise present. The 4115 has a proven reliable performance capability, being since its introduction, used by broadcasters throughout the world. The high degree of acoustic damping applied to the robust corrugated aluminium ribbon ensures freedom from resonance and relative immunity to handling noises and mechanical shocks.
There are many situations in which speech is partially or completely drowned out by background noise; for example in aircraft, saw mills, shunting yards, or power stations. Yet these are all places where it may be a matter of life and death to have spoken instructions heard and obeyed without a second's delay. The 4115 is the microphone of choice for these circumstances. There are two special versions for use in aircraft where, in addition to the other requirements, it needs to be compatible with the aircraft's electronics. These models are approved by the Civil Aviation Authority, adn are also the choice of aircraft manufacturers and airlines.
Features
- Up to 20 dB reduction of middle and low frequency interfering sounds
- Close talking without breath or pop noises
- Broadcast quality speech reproduction
- High sensitivity combined with light weight
- Lip bar to maintain correct distance for speech output
- Discrimination against other sound sources from very close range
- Gives high output level to normal speech
- Obviates unpleasant blasting effects from explosive consonants
- Clear natural reproduction of speech free from disturbing effects
Specifications
Model 4115: Noise cancelling pressure gradient transducer ribbon microphone
Ribbon: Corrugated aluminum ribbon protected by fine woven nylon gauze
Polar response: Bi directional
Frequency response: 80 Hz to 8,000 Hz
Impedance: 300 ohm
Sensitivity: -50dB W.R.T. IV/Pa.
Distortion: Less than 1% at 120 dB SPL
Body Housing: Brass perforated case with stainless nose and mouth screens, pvc covered handle designed to provide a natural holding position for long periods
Connection cable: 2 core and screen 30 ft. (9.1 metres)
Dimensions: 8" (20.3 cm) long x 2" (5.08 cm) width x 1 1/2" (3.81 cm) deep
Weight: 10 OZ (280 g)
Finish: Body stain chrome and Brown enamel paint with Brown pvc covered handle
Packaging: Each microphone comes in a foam lined rigid plastic carrying case for safe keeping
