Designed for indoor communication systems, including transportation, restaurant, and industrial applications. Suitable for environments with high levels of background noise.

Developed for computer voice recognition applications, the 503BG microphone offers excellent voice fidelity while reducing background noise. Also, use the 503BG in other close-talking applications such as paging and talkback.

The 503BG features a low-impedance, moving coil type transducer with an integral humbucking coil and an attached two-conductor shielded cable with a built-in strain relief. It produces a frequency response with an essentially constant output voltage over the voice spectrum when used close to the sound source.

The 503BG's case is aluminum with a black enamel finish. It mounts to a gooseneck, a fixed pipe or a microphone stand using a standard 5/8"-27 thread. To secure the mounted 503BG, tighten the 4-40 screw with the supplied #4 Allen (hex-head) wrench.

Acoustic Considerations

The 503BG maximizes performance in close-talking applications through its tailored frequency response, directionality and distance discrimination. It optimizes and controls sounds within the 100 to 7000 Hz frequency range and reduces sounds outside that range. The 503BG rejects noise through its inherent directional properties and discriminates against distant sounds in favor of close-range sounds.

Operation

For best performance, speak as close to the 503BG as comfort permits. A distance of 1 to 5 cm (0.4 to 2 inches) provides the greatest discriminations between voice and background noise.

• Optimized performance in voice processing and computer voice recognition applications
• Smooth frequency response tailored for voice communications with excellent fidelity in the voice range
• Cardioid pickup pattern and close-talking operation keep unwanted signals and background noise at low levels
• Constant output over voice spectrum when close-talked
• Hum-bucking coil minimizes undesirable hum effects from computer displays
• Low-impedance design permits long cable runs in extreme hum fields
• Small unobtrusive design does not interfere with CRT visibility
• Rugged and reliable for years of consistent operation
• Attaches to flexible gooseneck arm (not included)
• Two conductor, shielded, bare-ended (no connector), straight cable
• Does not require DC power for operation

User Guide