Laboratory2, LTD
Page4
Version of 09.04.2019
1 Product specification and description of its operation
1.1
Purpose of the voice recorder.
The voice recorder Soroka-11E is designed to record audio with the built-in digital MEMS mi-
crophone in mono mode to the micro SD memory card or micro SDHC Class4 or higher. The dicto-
phone is powered by the
LR1 battery of 1.5 V
.
1.2
Basic specifications of the voice recorder are listed in Table 2.
Table 2. Specifications of the voice recorder SOROKA- 11E.
№
Parameter
Description
1
Dimensions
36,7x14,2x17,7
2
Operating temperature range
-20° C to +40° C
3
Recording file format
«.WAV»
4
Type of memory and filing system
Removable memory cards micro SD, micro SDHC;
FAT32 filing system
5
Interface with PC
via micro SD card
6
Element power supply
Battery LR1 (1,5 V)
7
Discretization of sound frequency
8 kHz, 16 kHz, 24 kHz, 32 kHz
8
Resolution
8 bit(u-law), 16 bit, 20 bit.
9
Microphone Sensitivity
-26 dBFS at 94 dB SPL (8-9 meters)
10
Non-Linear Distortion Ratio
less than 3%
11
Frequency range as per
level - 3 dB
Sample rate
8 kHz
3 Hz – 3.384 kHz
16 kHz
3 Hz – 6.768 kHz
24 kHz
3 Hz – 10.152 kHz
32 kHz
3 Hz – 13.536 kHz
12
Duration of work, when
the resolution is 16-bit
with u-law compression
Sample rate
Typical operating time* (hours)
8 kHz
236
16 kHz
150
24 kHz
119
32 kHz
96
13
Duration of work, when
the resolution is 16-bit
without compression
Sample rate
Typical operating time* (hours)
8 kHz
213
16 kHz
128
24 kHz
90
32 kHz
72
14
Duration of work, when
the resolution is 20-bit.
Discretization fre-
quency
Typical operating time* (hours)
8 kHz
153
16 kHz
91
