Laboratory2, LTD
Page4
Version of 21.12.2020
1 Product specification and description of its operation
1.1
Purpose of the voice recorder.
The voice recorder Soroka-18E 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.
1.2
Basic specifications of the voice recorder are listed in Table 2.
Table 2. Specifications of the voice recorder SOROKA- 18E.
№
Parameter
Description
1
Dimensions
24x14,1x9
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
Charger type
Cable USB – micro USB
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)
At least ** (hours)
8 kHz
65
39
16 kHz
46
27
24 kHz
33
20
32 kHz
27
16
13
Duration of work, when
the resolution is 16-bit
without compression
Sample rate
Typical operating
time* (hours)
At least ** (hours)
8 kHz
56
33
16 kHz
34
20
24 kHz
27
16
32 kHz
21
12
14
Duration of work, when
the resolution is 20-bit.
Discretization fre-
quency
Typical operating
time* (hours)
At least ** (hours)
