1080-100D-Issue-C

1080-100D-Issue-C
DSP noise cancellation products
bhi
bhi
NEIS-RM
Noise Eliminating Intercom System
Remote Microphone Version
Installation
and
Operating Manual
DSP Noise Cancellation
bhi Ltd
PO Box 318
Burgess Hill
West Sussex
RH15 9NR
England
tel: +44 (0)845 217 9926
fax: +44 (0)845 217 9936
[email protected]
www.bhi-ltd.com
Page 20
NEIS-RM Intercom Operating Manual
1080-100D
Issue C
NEIS-RM Intercom Operating Manual
Page 1
Important Information
Copyright
This publication, including all photographs and
illustrations is protected under international copyright
laws, with all rights reserved. Neither this manual, nor
any of the material within, may be copied or reproduced
without the written consent of bhi Ltd.
Disclaimer
The information in this document is subject to change
without notice. bhi Ltd. makes no representations or
warranties with respect to the contents hereof and
specifically disclaims any implied warranties of
merchantability or fitness for any particular purpose.
Furthermore, bhi Ltd. reserves the right to revise this
publication and to make changes from time to time in
the content hereof without obligation of bhi Ltd. to notify
any person of such revision or changes.
Page 2
NEIS-RM Intercom Operating Manual
< page intentionally blank >
NEIS-RM Intercom Operating Manual
Page 19
Packing List:
Please check the contents of the box.
• Operating manual
• NEIS-PSU - Medical power supply with worldwide adapters
• NEIS-MIC - Remote microphone
• NEIS-DU - Desk console
• NEIS-SPKR - Loudspeaker unit
Note: We recommend that installation be carried out by qualified
personnel.
Please study this manual before attempting to install the intercom.
To install this intercom you will need the following additional items:
• CAT5 network cable/connections (straight-through).
• Suitable fixings for mounting the loudspeaker
• Suitable tools for installation of the above
< page intentionally blank >
Page 18
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 3
Contents
2.
3.
4.
Introduction
1.1 System overview
1.2 Features
6
6
7
Intercom description
2.1 Intercom components
2.2 Intercom component description
2.2.1
Loudspeaker unit
2.2.2
Remote microphone
2.2.3
Desk console
8
8
9
9
9
9
Installation
3.1 Basic installation
3.2 Power supply
3.3 Loudspeaker mounting
3.4 Cable connections
3.5 Desk console
11
11
11
11
12
13
Operation
4.1 Desk console controls
4.2 Loudspeaker controls
4.3 Noise cancellation level setting
14
14
15
16
L evel
Tone Reduction
White Noise
Reduction
1
4dB
9dB
2
5dB
11dB
3
6dB
13dB
4
8dB
15dB
5
16dB
17dB
6
21dB
20dB
7
25dB
24dB
8
65dB
35dB
Table 1. Tone and noise reduction levels.
The DSP levels are set by the following combination of jumpers.
L evel
J5 (5 - 6) J5 (3- 4) J5 (1- 2)
1
On
On
On
2
On
On
Off
3
On
Off
On
4
On
Off
Off
5
Off
On
On
6
Off
On
Off
7
Off
Off
On
8
Off
Off
Off
4. Operation.
1.
Table 2. Preset DSP levels using on board jumpers.
Page 4
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 17
4.3
Noise cancellation level.
Weee Statement for correct disposal of this product
The noise cancellation filter level is set to the optimum position (level
7). However the noise reduction may be changed to suit the specific
requirements of the installation. The unit has a choice of 8 levels of
noise reduction, these are set by 3 jumper plugs accessible from the
bottom of the desk unit, underneath the serial number label. The
jumpers can be changed using a small pair of snipe nosed pliers or
similar tool
(Applicable in the European Union and other European countries with
separate collection systems). This marking shown on the product or
its literature, indicates that it should not be disposed of with other
household wastes at the end of its working life. To prevent possible
harm to the environment or human health from uncontrolled waste
disposal, please separate this from other types of wastes and recycle
it responsibly to promote the sustainable reuse of material resources.
Household users should contact either the retailer where they
purchased this product, or their local government office, for details of
where and how they can take this item for environmentally safe
recycling. Business users should contact their supplier and check the
terms and conditions of the purchase contract. This product should
not be mixed with other commercial wastes for disposal.
Noise cancellation
jumper plugs
Desk console
4. Operation.
Figure 9. Bottom view of desk console.
When the jumper is placed over
the two pins the jumper is ON.
When the jumper is connected to
one pin only , or removed from the
board it is OFF. To reduce the risk
of losing the jumper it is advised
to place it on one pin when using
the OFF position.
6
2
J5 pins
5
3
1
OFF
ON
Figure 10. Jumper details.
Page 16
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 5
1. Introduction.
1.1
System overview:
The bhi NEIS Noise Eliminating Intercom System enables clear voice
communications from within noisy environments. Using unique Digital
Signal Processing (DSP) technology, unwanted noise and
interference picked up by the microphone in the communication can
be removed from the signal to leave clear intelligible speech.
The NEIS is suitable in a wide range of noisy applications, where
the sounds of fans, motors, engines, air-conditioning, traffic etc.,
give rise to poor voice communications. The system is particularly
useful for improving the voice quality in medical and industrial
environments, where noisy machines can make voice
communication difficult.
Remote Privacy
For privacy at the remote speaker end, turn the system off using
the Volume ON / OFF control on the desk console unit.
Note: Using this function will mean that the user will no longer be
monitored.
4.2
Loudspeaker control.
The volume of the loudspeaker can be adjusted by the rear mounted
control.
Using minimal hardware components, the installation and operation
of the bhi intercom system is very easy, connections being made
via a single cat 5 data cable. The NEIS is pre-configured for optimum
noise cancelling, and is fully adaptive to changing environmental
conditions. It is suited to a variety of applications, where clear “noise
free” two-way voice communications are important, including:
Hospital radiotherapy/radiology treatment rooms, mines, railway and
transport depots, customer help points, factories & office
communications. In fact the NEIS provides a simple effective solution
for anyone trying to communicate from within a noisy environment.
Simply plug in the power and the system is ready to go.
4. Operation.
1. Introduction.
The NEIS consists of a stylish, robust, desktop speaker control unit,
with a “push-to-talk” button, connected to a remote “hands free”
speaker unit, with a remote microphone attached. This allows the
noisy location to be constantly monitored, an important feature for
safety critical environments.
Push To Talk
The desk console unit default mode is to listen to the remote speaker,
all speech at the remote speaker will be heard when the unit is
switch on. Press and hold the Push-to-talk (ptt) switch to enable
communication to the remote speaker, release the button to hear a
response back from the user.
Figure 8. Rear view of loudspeaker unit
Page 6
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 15
4. Operation
4.1
1.2 Features:
Desk console controls.
Power on/off
volume control
Noise cancellation
on/off switch
Up to 98% noise reduction
Clear two-way voice communications
Superb audio quality using bespoke audio circuits
Easy to install modular system
Simple connection via single cat 5 computer cable
Stylish desktop speaker console with “push to talk” function
Robust speaker unit with remote microphone & separate
volume control
Noise filter Monitor switch
On/off volume control switch
Medical power supply 12 VDC (1.25A)
Dims (WxDxH) Speaker unit 180 x 160 x 240mm
Dims (WxDxH) Control unit 150 x 220 x 70mm
Power
connector
CAT 5 Loudspeaker
connector
Power On Off
Ensure the power supply is plugged in at the wall socket and the
wall socket is turned on. Using the on/off Volume control knob on
the rear of the desk unit, turn on the unit.
1. Introduction.
4. Operation.
Figure 7. Rear view of desk unit
Noise Cancellation
The desk unit is pre-set for optimum noise reduction and adjustment
is not normally necessary. The noise cancellation switch on the rear
of the unit can be used to momentarily disable the noise cancellation
system, hold the switch up in the off position and all noise will be
heard from the remote speaker. Release the switch and the noise
will be removed. Adjust the volume control for a comfortable listening
level.
Page 14
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 7
2. Intercom description.
2.1
3.5
Intercom components.
The NEIS consists of the following components:
Loudspeaker unit
Desk console
Power supply
Remote microphone
Desk console.
Site the desk console unit in the quiet area. Connect the other end
of the CAT5 cable to the loudspeaker socket, and the power
supply into the power connector.
Desk console
CAT5 cable from
loudspeaker
DC power supply
Desk console
Figure 6. Desk console connections.
3. Installation.
2. Intercom description.
Loudspeaker unit
Remote “plug-in” microphone assembly
DC power supply
Figure 1. Intercom components.
Page 8
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 13
3.4
Cable connections.
2.2
Connections:
Connections are made using standard CAT 5 straight-through twisted
pair RJ45 cables
Intercom component description.
2.2.1Loudspeaker unit.
The loudspeaker unit mounts in a suitable location in the noisy area
to give optimum voice quality to the user. The unit features a
separate volume control, enabling the speaker output volume to be
set up to suit the surrounding conditions and environment. The cat
5 cable connects at the rear of the unit.
Figure 5. CAT5 cable connections.
NEIS-DU
NEIS-SPKR
1= White/Orange
1= White/Orange
2 = Orange
2 = Orange
3 = White/Green
3 = White/Green
4 = Green
4 = Green
5 = White/Blue
5 = White/Blue
6 = Blue
6 = Blue
7 = White/Brown
8 = Brown
7 = White/Brown
8 = Brown
Page 12
NEIS-RM Intercom Operating Manual
2.2.3 Desk console unit.
The desk console unit is best located in a quiet area (normaly the
equipment control room), and receives audio from the user in the
noisy area through its small loudspeaker. It has a push-to-talk (ptt)
button on the front to enable speech back to the user. The unit has a
power on/off switch with volume control, a separate noise filter monitor
switch on rear of the unit, a noise filter level select switch on the
bottom of the unit. This unit contains the noise cancellation
electronics to enable the removal of any noise that is present with
the voice signal. The unit connects to the cat 5 cable via the connector
on the rear of the unit.
NEIS-RM Intercom Operating Manual
Page 9
2. Intercom description.
3. Installation.
2.2.2 Remote microphone.
The remote microphone connects to the rear of the loudspeaker
unit, and is best placed as near to the user as possible to obtain
optimum audio performance. The most common routing of the
microphone cable is through the ceiling and suspended down in-line
with the patients face and as near to their mouth as possible. It can
also be clipped inside the gantry using a standard plastic cable holder
or ty-rap.
3. Installation
3.1
3.3
Basic installation diagram.
Loudspeaker
CAT5 cable
Desk console
Loudspeaker mounting.
Mount the wall bracket supplied with the speaker unit in a suitable
location in the noisy area, so that it optimizes the audio for the user.
The microphone and cat 5 cable should be connected at the rear of
the speaker before the speaker is secured into the bracket, and the
microphone should be mounted at least 1 metre away from the
speaker.
Microphone
Volume
connector
control
CAT5 cable
connection
Power supply
Remote
Microphone
Quiet area
Noisy area
Close up of
connections and
controls
Figure 2. Basic block diagram.
The medical power supply used for the NEIS is a modular unit, and
consists of a modular pin unit and the power supply so as to
accommodate the different types of voltage and connections around
the world. Before the power supply can be used, plug the pin unit
supplied onto the power supply body until it clicks into place.
Rear of speaker unit
3. Installation.
3. Installation.
3.2 Power supply.
Microphone
Push pins onto
power supply body
Figure 4. Loudspeaker connections.
Figure 3. Power supply.
Page 10
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 11
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement