Sennheiser IAS MO 2000 SET Abmessungen

Polar pattern Omni-directional

Sensitivity 15 mV/Pa

S/N related to 1 Pa sound pressure >50 dB(A)

Max. sound pressure level 134 dB

Amplification

Infinitely variable in the range

+/-15 dB, switchable in steps 0 dB,

+ 20 dB, + 40 dB

Optical fiber multimode 200/230 μm

Operating temperature range MO 2000 H: -10 °C to +70 °C

MO 2000 CU: 0 °C to +40 °C

Power supply

Plug-in power supply with country

adapters 100-240 V AC to

12 V DC, 5.4 W

Current consumption 120 mA

Output impedance Approx. 330 Ωasymmetrical /

660 Ωsymmetrical

AF output level 15 mV/Pa (potentiometer in mid

position, switch set to 0 dB)

Frequency response 20 Hz to 40 kHz (±6 dB)

Rugged design for use in areas of

aggressive substances (gases, salts, and

humidity) and radiation

Metal-free microphone components

prevents interference with other

equipment

High signal-to-noise ratio

Extensive frequency response

Reliable operation for acoustic measuring

and communication

KEY FEATURES TECHNICAL DATA

Optical Microphone Systems

MO 2000 Set and IAS MO 2000 Set

The Optical Microphone system, designed for special applications such as acoustic monitoring in industrial settings,

medical procedures, and technological measurement, is available in two variants:

MO 2000 Set – Includes the optical microphone with the MO 2000 H optical cable, the MO 2000 CU central unit,

power supply and carry case.

IAS MO 2000 Set – In addition to the above components, this system also includes the MZWW 2000 Set weather

protection accessory kit, making it ideal for use in potentially explosive atmospheres and outdoor applications.

The Sennheiser MO 2000 microphone head, which has an external diameter of 0.5 inches, is made of a plastic material

that is suitable for use in areas with aggressive substances (such as gases, salts, humidity) and radiation. All

components of the microphone head, including the optical waveguides, are free of metal; no electric current flows.

IAS MO 2000 Set

MO 2000 Set

Sennheiser Electronic Corporation

1 Enterprise Dr • Old Lyme, CT 06371

(860) 434-9190

APPLICATIONS:

Industrial applications - Possible applications for the optical microphone include the acoustic monitoring of power utility

plants (including hydroelectric, wind, and nuclear plants), as well as oil and natural gas production facilities. In this

example, the microphone would “hear” slow leaks, which, due to their small size, cause neither a pressure loss nor an

alarm message in other monitoring systems.

Medical applications - The microphone is ideal for use in magnetoencephalography (MEG) and magnetic resonance

imaging (MRI). For example, it maintains communication with the patient during MRI scans or achieves active noise

cancellation within the MRI machine. The optical microphone does not disturb the imaging process and is itself not

influenced by the strong fields inside MRI equipment.

Measuring applications - The microphone is ideal for use in EMI/EMC laboratories, as it does not influence the electric

field. In this case, for example, it functions like an ear on a cellular phone.

An optical principle is the only microphone principle in which the microphone head and electronics can be located far

away from each other. The optical microphone relies on light from an LED, which is directed onto a reflective diaphragm

via a fiber-optic cable (optical transmitter waveguide). The membrane then reflects part of the light into an optical

receiver waveguide. If the diaphragm is moved by sound signals, the reflected light beam is displaced, allowing more or

less light into the receiver waveguide. At the end of the receiver waveguide, a photodiode converts the light intensity

variations into electric signals.

HOW IT WORKS

Optical Microphone Systems

MO 2000 Set and IAS MO 2000 Set

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