Pambry Listen Ear User manual

Listen Ear™
Personal Noise
Dose Meter
User Manual

SOFTWARE REVISION
The User Manual supplied with the Listen Ear™ reects the rmware
installed at the time of manufacture. Updating the rmware may add or
change product features.
SAFETY INFORMATION
For safe practice only operate in accordance with the instructions in this
manual.
WARNING
To avoid personal injury, follow the guidelines below:
• Do not remove cover.
• Use the Listen Ear™ only as specied in this manual.
• Do not use around explosive gas or vapour.
• It is your responsibility to contribute to a clean and
healthy environment by using the appropriate local
return and collection systems.
• The symbol shown on the left indicates that
separate collection systems must be used for any
discarded equipment or batteries marked with the
WEEE Symbol.
PAMBRY DISCLAIMER
Pambry Electronics reserve the right to change specications or update
this user manual at any time without prior notice.
!
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CONTENTS
1.0 INTRODUCTION 4
2.0 FEATURES 4
3.0 DESCRIPTION 5
3.1 Charging Before Use 6
3.2 Connecting to a PC 6
3.3 Switch ON 6
3.4 Switch OFF 6
4.0 PAGES 7
5.0 MENU 8
5.1 Pages 8
5.2 Settings 8
5.3 Info 12
6.0 CALIBRATION 12
6.1 Calibration procedure 12
7.0 ATTACHING YOUR Listen Ear™ 13
7.1 Mounting Listen Ear™ with external microphone 13
8.0 SPECIAL FEATURES 14
8.1 Anti-Knock & Vibration System 14
8.2 Motion Detection System 14
8.3 Auto Power OFF 14
9.0 MEASUREMENTS 14
9.1 Use as a Sound Level Meter 14
9.2 Use as a Noise Dosimeter 15
10.0 FIRMWARE UPDATE 16
11.0 THEORY BEHIND THE Listen Ear™ 16
11.1 Reference Information - NIHL 16
11.2 Ear Protection 18
11.3 A, C & Z Filter Weighting 18
11.4 F & S Time Weightings 19
12.0 REPORT AND HISTORY FILES 20
13.0 SPECIFICATION 22
APPENDIX A - EC DECLARATION OF CONFORMITY 24
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1.0 INTRODUCTION
Welcome to your new purchase of your Listen Ear™ Noise Dose Meter
and thank you for choosing Pambry Electronics Ltd, a dedicated UK
manufacturer of audio products sold worldwide.
This professionally made and calibrated instrument is by far the best
value for money device of its type in the world. It will assist you to
monitor your hearing health and Noise Induced Hearing Loss (NIHL).
As one of the smallest and lightest units made, its ease of use belies the
hidden complexity inside. The theory behind NIHL shall be provided in
this manual.
2.0 FEATURES
• Compact and light design to clip on during the working day
• View current noise level and total exposure of the day on LCD display
• Knock and Vibration Cancelling Technology - patent applied
(1611153.6)
• Revolutionary design to simulate the effect of wearing ear defenders
• Use Mobile Phone to control and view data
• Battery life up to 160 hours / 4 working weeks
• Charged using USB
• Comply to the ‘Control of Noise at Work Regulations 2005 (UK)’
• Complies to international standards: IEC 61672-1, IEC 61252
• Produce a daily report and statistics of the work environment by
downloading data
• Default 8-hour day, adjustable in menu
• Tamper proof facility
• Bright LED for dose alarm warning
• Contains A, C and Z-weighting lters to mimic the frequencies heard
by the human ear
• Built in or External Microphone
• Calibrated during manufacture
• Data logging - Sound / temperature / humidity / movement
• No USB Drivers required to download data
• Class 2 sound level meter
• Includes movement and orientation monitor
• Records Temperature and Relative Humidity
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Built-in microphone
‘Info’ LED
Scroll/power button
LCD display
Enter/record button
3.0 DESCRIPTION
Status Bar Icons
Battery level Indicator
Report enabled
Wearing Ear Defender
External Microphone Connected
Noise dose record duration - HH:MM:SS
Acoustic Overload recorded.
Recorded dose may not be accurate
Supplied with your Listen Ear™ Optional Accessories
• Quick Start Guide • Sound Calibration Unit (SCU)
• User Manual • External Microphone
• Micro USB 2.0 Cable 1.5m • Wall bracket
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00:00:00

3.1 Charging Before Use
Before use ensure the unit is fully charged by connecting it into a suitable
charger or computer USB port.
Charging is indicated by an “Info” LED and/or display icon. Red light
indicates “charging in progress”, Green light means that battery is “fully
charged”. Charging may take up to 5hours, depending on where the
device is connected. Battery life between charges is up to 160hours
(4 working weeks), depending on the activated options.
The ‘Info LED’ blinks RED once every 3 seconds when the battery level
is below 10%.
3.2 Connecting to a PC
The method of accessing the stored les in your Listen Ear™ is
by using your computer’s le explorer application, where the
stored les can be downloaded and manipulated as required.
Connect your Listen Ear™ device to your PC using the USB Cable
supplied. Microsoft® Windows® shall install the drivers automatically.
Windows® explorer will be activated granting you access to stored les
located on your device.
3.3 Switch ON
On initial power up or if the battery has been discharged you will
be prompted to the time/date menu.
To switch ON your Listen Ear™ press the “Scroll/Power” button. The
Pambry ‘splash’ screen will appear followed by the recently used ‘page’.
There are a number of different ‘pages’ each one represents a specic
measurement or function. Each ‘page’ is obtained by pressing the “Scroll/
Power” button. Each press scrolls to the next ‘page’ then returns where
you started. The unit wakes on power up in the rst ‘page’ DOSE and
the default set of measurement ‘pages’ are Dose and Level.
There are a further 5 screen pages which can be accessed via the
MENU screen (see CLOCK settings below) and scrolling to PAGES.
3.4 Switch OFF
Depressing the “Scroll/Power” button for 1 second will turn the unit OFF.
Note that if a Noise Dose recording is in progress this will stop
and reset.
Unit cannot be switched off in MENU OPTIONS Page as
SCROLL MODE is activated.
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If needed, Listen Ear™ can be manually ”rebooted” by holding
the “Scroll/Power” button for 8 seconds. Current recording will
be aborted and settings will be set to factory defaults. Report and
History les will not be affected.
4.0 PAGES
There are 5 ‘pages’ so called because each represents a specic
measurement or function.
Each “Scroll/Power” button press turns to the next ‘page’ and eventually
back to the rst one. Section 5.1 describes way of enabling/disabling
required ‘pages’.
Dose
• Current Noise Dose percentage
• Projected Noise Dose percentage
(at the end of the 8h shift)
• Graphic representation of the Current
Noise Dose (0-100%)
Level
• Current Sound Pressure Level
• Maximum Sound Pressure Level
(current session)
History
• Last 90 minutes of Sound Pressure Level
• Current Sound Pressure Level
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Details (current session)
• LAS - Sound Pressure Level
• LEQ - equivalent continuous noise level
• LEX8h - noise exposure level averaged over 8h
• Maximum Sound Pressure Level
• Minimum Sound Pressure Level
Temperature
• Current temperature
• Current humidity
• Minimum temperature and humidity
(current session)
• Maximum temperature and humidity
(current session)
5.0 MENU
To enter or exit from Menu press and release
both buttons simultaneously.
Button functions depend on the current Menu
location and are displayed at the bottom of the
screen.
5.1 Menu / Pages
The ‘Pages’ menu allows to enable/disable required
pages. At least one page must be enabled.
Only parameters from enabled pages are recorded
in the report and history les (if enabled).
5.2 Menu / Settings
Your Listen Ear™ has a number of adjustable
settings which can be modied, enabled &
disabled if desired.
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Menu / Settings / Ear defender
Under the EU/UK Control of Noise at Work Regulations 2005, noise
levels above 85dBA require the use of hearing protection. If you wish
to use your Listen Ear™ whilst wearing hearing protection then this is
possible by inputting the SNR (see page 18) attenuation gure from the
specication of your hearing defender or ear plug into the SETUP page
screen. The Listen Ear™ will take note of the new setting and give display
readings as if measuring at your ear inside the Hearing Defender earmuff
and not outside in the external environment.
The ‘Ear defender’ menu displays 3 lines of
information regarding the current settings.
Line 1 - Enable or disable Ear Defender
correction
Line 2 - Current Ear defender model from
the pre-set list.
Line 3 - Current SNR value
A range of preprogrammed Ear Defenders with
SNR ratings can be selected by entering the ‘Line
2’. If you are wearing an ear defender contained
in the list, scroll to the ear defender being used
and press OK. The SNR value will be used for
the Noise Dose and Sound Level calculation.
Alternatively, if wearing an Ear defender not
displayed in the list, Scroll to the SNR, press OK
and enter SNR value for the Ear defender worn.
See section 11.2 for information regarding ear protection.
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Menu / Settings / Bluetooth
Enable / disable Bluetooth functionality.
For more details please refer to Listen Ear™ APP user guide.
Menu / Settings / Reports
In addition to the ‘easy to understand’ Noise
Dose presented as a single number, Listen Ear™
can produce and save Daily Report Files.
First menu line enables / disables report and
history saving.
The method for accessing the stored les in
your Listen Ear™ is by using your computer’s le
explorer application, where the stored les can
be downloaded and manipulated as required.
Two types of les are stored (depending on settings):
• Report les, named rep_0001.txt (in folder /REPORTS), containing
recording session details. These can be opened by any text editor, i.e.
Notepad in Windows based PC’s
• Time history les, named hst_0001.csv (in folder /HISTORY), containing
periodically saved levels measured. Data is stored in the csv (comma
separated values) format and can be opened by any text editor, i.e.
Notepad or Microsoft Excel in Windows based PC’s and used to post
process recorded data, i.e. to plot a Time History graph.
The Time history sets how often data is recorded in the history le.
Longer data recording periods decrease the history le size,
allowing to store more les.
The Memory Manager
allows you to check available
storage space, content and
format memory if necessary.
CAUTION - memory
formatting will delete all
your existing report and
history les!
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