Crown CM-311A Bedienungsanleitung PDF herunterladen (Seite 5)

Installed Microphones

Boundary Layer Microphones

Ticket window

Surveillance and security

Conferencing

• Hemispherical polar pattern, excellent intelligibility

• Low frequency roll off to reduce HVAC rumble

• Inconspicuous, resembles a light switch

• Mounts a standard wall plate

• Screw terminal, no need for connectors

The PZM

-11 present a low-cost solution for security

and surveillance applications. Mounted on a standard

wall plate the PZM

-11 doesn’t look like a microphone

but rather an ordinary light switch.

Like other Pressure Zone Microphones, the PZM

-11

utilize the Pressure Recording Process™ in which a

miniature condenser microphone capsule is mounted

very close to a sound reflecting plate or boundary. The

benefits are a wide, smooth frequency response free

of phase interference, excellent clarity and “reach”,

and consistent pickup anywhere around the microphone.

Intelligibility is excellent, with low frequencies below the

voice range rolled off to reduce the pickup of heating,

ventilation or air-conditioning rumble (HVAC noise). The

high-frequency response is boosted slightly to aid clarity

and articulation. Electronics on the rear of the plate offer

screw terminals, eliminating the need for connectors.

The PZM

-11 has a mic-level output and is powered by

12-48 V phantom power.

Item number:

PZM11 6000H50050

PZM

-11

•

Polar pattern:

Frequency response:

Sensitivity:

Maximum SPL:

Equivalent noise level:

Signal/noise ratio:

Impedance:

Finish:

Dimensions:

Net weight:

Connector:

Hemispherical

80 to 20,000 Hz

5 mV/Pa (-46 dBV)

120 dB

26 dB-A

68 dB (A-weighted)

225 ohms

Off-white. May be painted any color.

11.506 x 7.05 x 2.946 cm (4.53 x 2.7 x 1.16 in.)

71 g (2.5 oz.)

Screw terminal

•

Polar pattern:

Frequency response:

Sensitivity:

Maximum SPL:

Equivalent noise level:

Signal/noise ratio:

Impedance:

Finish:

Dimensions:

Net weight:

Connector:

Hemispherical

80 to 10,000 Hz

5 mV/Pa (-46 dBV)

100 dB

26 dB-A

68 dB (A-weighted)

75 ohms

Silver. May be painted any color.

7.061 x 11.506 x 4.374 cm (2.78 x 4.53 x 1.722 in.)

71 g (2.5 oz)

Screw terminal

Outdoor intercoms

Toll booths

Surveillance and security

Home automation

• Hemispherical polar pattern, excellent intelligibity

• Weather-resistant model for outdoor use

• Line-level output connects directly to video recorders

• Inconspicuous, mounts a standard wall plate

• Screw terminals for easy installation

The PZM

-11LLWR is a weather resistant Pressure Zone

Microphone

based on the PZM

-11 with a balanced,

line-level output. A plastic membrane inside the micro-

phone protects the mic capsule from water damage. The

microphone will work during and after rainfall. If water

freezes on the membrane, the mic’s frequency response

will change, but will return to normal when the ice melts

and the membrane dries. Applications include fast-food

restaurants, outdoor intercoms, toll booths, bridges,

theme park security, home automation, and so on.

The microphone can be plugged directly into a VCR line

input – no costly mic preamp is needed. Output (via

screw terminals) can be balanced or unbalanced.

Because of its tailored response and PZM

construction,

the PZM

-11LLWR will pick up conversations or other

desired sounds with extra clarity.

Powering is by 12-24 V AC or DC.

Item number:

PZM11LLWR 6000H50040

PZM

-11LLWR

akg-crown-folder_2608 27.08.2008 9:13 Uhr Seite 5

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