Stock 80Khz Underwater Acoustic Transducers Hydrophone
Product Description
Stock 80Khz Underwater Acoustic Transducers Hydrophone
1.Measurement conditions
measuring distance | 1m～3m |
measuring depth | 1m～3m |
Measurement basis:
GB/T 7965-2002 "Acoustic Underwater Acoustic Transducer Measurement".
2. Measurement content:
1.
2.
2.1. Voltage emission response and sound source level:
Measure the emission response within 50kHz～110kHz, and the sound source level at 80kHz is not less than 185dB.
2.2. Receiving sensitivity
Measure the receiving sensitivity within 50kHz～110kHz, not less than -215dB.
2.3. Directivity
Horizontal directivity: Horizontal omnidirectional at 80kHz.
2.4. Hydrostatic pressure: 4MPa.
1. Measurement data
There are 2 transducers in total, 1# (without cable) and 2# (with 20m cable).
3.
Transmitting voltage response and receiving sensitivity (dB)
response | sensitivity | |||
f/kHz | 1# | 2# | 1# | 2# |
50.0 | 138.5 | 138.7 | -208.9 | -209.4 |
52.0 | 139.0 | 139.3 | -208.3 | -208.3 |
54.0 | 139.4 | 139.3 | -208.8 | -208.2 |
56.0 | 140.7 | 140.5 | -208.6 | -208.3 |
58.0 | 141.4 | 141.7 | -208.1 | -208.8 |
60.0 | 142.0 | 142.3 | -208.6 | -209.5 |
62.0 | 142.9 | 143.1 | -209.5 | -208.7 |
64.0 | 143.5 | 143.8 | -208.6 | -208.4 |
66.0 | 143.8 | 144.2 | -209.8 | -209.8 |
68.0 | 144.0 | 144.6 | -208.1 | -209.2 |
70.0 | 144.4 | 144.8 | -209.6 | -209.7 |
72.0 | 143.7 | 145.5 | -209.2 | -209.7 |
74.0 | 144.2 | 146.2 | -208.9 | -210.2 |
76.0 | 145.5 | 146.2 | -210.0 | -211.0 |
78.0 | 145.0 | 146.0 | -209.9 | -211.0 |
80.0 | 144.6 | 146.5 | -209.5 | -210.5 |
82.0 | 145.3 | 146.2 | -209.6 | -210.8 |
84.0 | 144.1 | 146.2 | -209.0 | -210.7 |
86.0 | 143.9 | 146.0 | -209.0 | -210.1 |
88.0 | 144.0 | 146.0 | -210.2 | -211.1 |
90.0 | 144.4 | 145.5 | -210.5 | -211.5 |
92.0 | 144.2 | 144.2 | -210.8 | -211.8 |
94.0 | 140.0 | 141,3 | -211.2 | -211.9 |
96.0 | 143.7 | 143.8 | -211.4 | -212.2 |
98.0 | 143.8 | 143.5 | -211.6 | -212.4 |
100.0 | 142.9 | 142.6 | -212.0 | -212.7 |
102.0 | 142.5 | 142.9 | -212.3 | -213.0 |
104.0 | 141.9 | 141.8 | -212.6 | -213.2 |
106.0 | 141.4 | 141.8 | -212.8 | -213.4 |
108.0 | 141.0 | 141,3 | -213.2 | -213.8 |
110.0 | 141.2 | 141.0 | -213.4 | -213.7 |
3.1. Sound Source Level (SL)：
f/kHz | d/m | UF/VPP | UJ/mVPP | M0 | SvL/dB | SL/dB | |
1# | 80 | 1 | 320 | 220 | -207.5 | 144.2 | 185.3 |
2# | 80 | 1 | 260 | 220 | -207.5 | 146.0 | 185.3 |
3.2. Directivity
1.
3.4. Hydrostatic pressure test
After the transducer has passed the 4MPa/1h, 0MPa/0.25h, 4MPa/1h, 0MPa/0.25 hydrostatic pressure test, the insulation resistance between the positive and negative electrodes of the transducer is greater than 500MΩ.
Transmitting voltage response and receiving sensitivity (dB)
1.
f/kHz | Response | Sensitivity | ||
1# | 2# | 1# | 2# | |
35 | 128.6 | 127.9 | -189.5 | -199.8 |
36 | 129.4 | 129.8 | -190.2 | -200 |
38 | 131.2 | 130.5 | -190.2 | -199.7 |
40 | 133 | 132.8 | -190 | -199.6 |
42 | 134.8 | 135.1 | -189.9 | -198.7 |
44 | 136 | 135.7 | -189.8 | -198.6 |
46 | 136.2 | 136.1 | -189.8 | -198.2 |
48 | 135.7 | 135.4 | -189.9 | -199.2 |
50 | 134.7 | 134.3 | -190.1 | -199.6 |
52 | 133.7 | 134.2 | -190.4 | -199.3 |
54 | 132.7 | 132.6 | -190.7 | -199.1 |
56 | 131.8 | 131.6 | -191.3 | -200.5 |
58 | 131 | 130.9 | -191.9 | -201.3 |
60 | 130.3 | 130.3 | -192.6 | -201.5 |
62 | 130.5 | 130.1 | -192 | -201.6 |
64 | 129.7 | 129.5 | -191.8 | -202 |
65 | 129.5 | 128.9 | -192 | -201.8 |
1.1. Sound Source Level (SL)：
f/kHz | d/m | UF/VPP | UJ/mVPP | M0 | SvL/dB | SL/dB | |
1# | 50 | 1 | 580 | 140 | -206.9 | 134.6 | 180.8 |
2# | 50 | 1 | 605 | 140 | -206.9 | 134.2 | 180.8 |
The sensitivity of the 2# transducer is about -200dB, which is lower than the index requirement, which is caused by the attenuation after connecting the 20m extended cable.According to the formula,The available attenuation is about 10.8dB. If this attenuation is removed, the sensitivity of the 2# transducer can meet the index requirements.