Microphone - 16822N0015

f.

Power taps:

[1/2] [1] [2] [4] [5] [10] [15] [20] [25] [_____]

watts

2.1.4.5

Microphone

Provide dynamic omni-directional microphones, [wall-mounted] [desk-mounted

with desk stand and touch-to-talk bar]. Include zone selector switches

[with indicating lights]. Microphones shall as a minimum conform to the

following specifications:

a.

Frequency response ratio:

Plus or minus 3 dB from 60 Hz to 10,000

Hz

b.

Impedance:

Low impedance, 150 ohms nominal

c.

Output level:

58 dB minimum

][2.1.5

Type 5 System:

Public Address and Monitoring System for Brigs

**************************************************************************

NOTE: Choose the appropriate paragraph and its

following subparagraphs for the features desired.

Delete paragraphs describing features not required.

System capacity should include future expansion

requirements.

**************************************************************************

NOTE: Use these paragraph and its subparagraphs for

brig facilities only. Not all manufacturers produce

all the listed features. Therefore, manufacturers

catalogs may be consulted as to the features

required. Avoid specifying equipment configuration

or design parameters which are unnecessarily

restrictive to competition.

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Provide amplifier, preamplifier, control panel, speakers, microphone, and

interconnecting cables. Speakers shall operate from a [70] [25] volt

distribution system.

2.1.5.1

Detection of Central Public Address System Trouble

Central public address system shall be continuously supervised for

detection of system trouble such as opens, shorts, grounds, mechanical

damage, power loss in all amplifiers (signal generators), external wiring

and speakers including voice controls and cones. System supervisory

equipment shall be rack-mounted.

2.1.5.2

Speakers

Speaker shall be two-way speaker/microphone type for use as audio

monitoring devices as well as public address speakers. Each speaker

installation shall be complete including, where applicable, drivers,

matching transformers, mounting brackets, acoustically treated back boxes,

and baffles selected with audio characteristics and physical construction

that are compatible with the total system.

SECTION 16822N

Page 15