Listen Ear™ Specification

Certificates and standards

IEC 61672: 1993

Class 2 Sound Level Meter

IEC 61252: 1993

Personal Sound Exposure Meter

CE Mark

Complies with the Directive on low voltage 73/23/CEE and Directive CEM 89/336/CEE modified by 93/68/CEE.

Sound measurement

LA

70dB to 140dB

LCPK

140dB

Over Load detector flag

140.1dB

Resolution

0.1dB

Frequency weighting

A, C

Time weighting

Slow (1s), Fast (1/8s)

Exposure measurement

Dose range

0% to 9999%

Exchange Rate

3dB, 4dB, 5dB, 6dB

Criterion Level for 100% Dose

75 to 90dBA (in 5 dB Increments)

Criterion Threshold

None, 80db, 90dB

Simultaneous analysers

Up to 2

Ear defender SNR range

5dB to 45dB

Results

SPL, LEQ, LEX8h, LAVG,TWA, LMIN, LMAX, Dose (%), Projected Dose (%,8h)

Environmental measurement

Temperature range

-40 ̊C to +80 ̊C

Temperature resolution

0.1 ̊C

Humidity

0% – 100% RH

Humidity resolution

1% RH

Motion

3 axis, 10s detection time

Memory

8Mbytes

Accessible by micro USB cable using PC – no drivers required.

Microphones

Internal

Pre-polarised condenser microphone

External

As above + proprietary USB interface

Data logging

Summary results for the measurement time

File type

Reports: *.txt, history: *.csv

Time history at intervals

10s, 30s, 1m, 5m, 10m

Temperature and humidity

Motion status

Number of events, summary time

User interface

Display

LCD, 128×128, backlit for 6s after keypress

Keypad

Two multifunction buttons

Other

Multicolour ‘info LED’

Battery

Non removable Lithium-Polymer

3.7V / 550mAh

Power consumption

2mA (avg), 20mA (max)

Auto power-off

1h (no motion, not recording)

Charging

Micro USB, up to 200mA

Operating time

Up to 160 hours / 4 working weeks (depending on features enabled)

Dimensions, weight, appearance

Size (H x W x D) including clip

83mm x 52mm x 19mm

Weight

52g

Available colours

White, Grey, Black

Environmental

Operating temperature

0 ̊C to +50 ̊C

Operating humidity

Up to 90% RH, non-condensing

Storage temperature

-10 ̊C to +60 ̊C

Storage humidity

Up to 90% RH, non-condensing

Notes

All values are typical unless otherwise stated.

Continuous product development and innovation are the policy of our company. Therefore, we reserve the right to change the specifications without prior notice.