Bosch Appliances 3922 988 43318 manual Electrical data, Microphones General, Headphones

Digital Congress Network Installation and Operating Manual Chapter 13 - Technical Data en 13-9

13.5	Electrical data
13.5.1	Microphones (General)
Freq. response		:	100 - 16.000 Hz
Transducer type		:	Condenser
Directional pattern		:	Cardioid
Max. SPL for THD <3%		:	110 dB
Equivalent input noise level		:	24 dB (A)
Sensitivity index (dB)
Pluggable microphones LBB 3549/xx
Overload microphone level		:	110 dB SPL
Nominal microphone level		: 85 dB SPL±2dB (1kHz)
Typical frequency response		;	100 - 16000 Hz
External microphone for CONCENTUS units
Element		:	Electret condenser
Polar pattern		:	omni-directional
Operating voltage		:	5V d.c.
Sensitivity		: -62 dB (0 dB = 1V/µbar, 1000 Hz) at load 1.2 KOhms
Frequency response		:	100 Hz - 14 kHz

13.5.2 Headphones

Light weight stereo headphones LBB 3443/00

Impedance	:	32	Ohms
Frequency response	: 50		Hz - 20 kHz (-10 dB)
Max. power	: 98 dB SPL/Earpiece at 1 mW/Earpiece
Weight	: 70 g (0.16 lb)
Colour	:	Charcoal with silver

Under the Chin headphones LBB 3441/00

Impedance LBB 3015/04:300 Ohms

Frequency response:50 Hz - 15 kHz (-10dB)

Max. power:60 mW

Sensitivity:107 dB SPL/Earpiece at 0 dbV/*

Weight:33 g (0.07 lb)

Colour:black

Interpreter headphones LBB9095/30

Impedance:2 x 720 Ohms

Frequency response:250 Hz to13 kHz (-10 dB) Max. power:200 mW

Sensitivity:97 dB SPL/Earpiece at 0 dbV/* 96 dB SPL/Earpiece at 1 mW/* Weight:78 g (0.17 lb)

Colour:black/grey

* = System

Single earphone LBB 3442/00

Impedance:32 Ohms

Frequency response:100 Hz to 5 kHz (-10 dB)

Max. power:5 mW

Sensitivity:114 dB SPL at 1mW/*

Weight:25 g (0.06 lb)

Colour:dark grey

Dynamic headphones LBB 3015/04 and LBB 9095/30 Impedance:360 Ohms (LBB 9095/30 2 x 720 Ohms) Frequency response:250 Hz to 13 kHz (-10 dB)

Max. power:200 mW Sensitivity:97 dB SPL at 0 dBV/* 96 dB SPL at 1mW/* Weight:90 g (0.19 lb) Colour:black/grey

13.5.3 Transmission links

•From delegate microphone to interpreter headphone

•From delegate microphone to delegate headphone

•From interpreter microphone to delegate headphone

•From interpreter microphone to interpreter headphone

•From auxiliary input to delegate headphone

•From auxiliary input to interpreter headphone

•From delegate microphone to auxiliary output

•From interpreter microphone to auxiliary output

Frequency response	:	125 Hz - 14.000 Hz *
Harmonic distortion	:	< 0.5%
Harmonic distortion at overload	:	< 1%
Crosstalk attenuation at 4 kHz	:	> 80 dB
Dynamic range	:	> 90 dB
* Intercom links		125 - 3.500 Hz

Bosch Security Systems 04-2003 3922 988 43318 en Electrical data