Cheap 28khz Cylindrical Acoustic Transducers for Underwater Positioning

Product Description

Cheap 28khz Cylindrical Acoustic Transducers for Underwater Positioning

1. Measurement content:

Resonant frequency：

Voltage Transmitting Response and Sound Source Level:

At the resonant frequency, the response must be no less than 141dB, the sound source level must be no less than 196dB, and the transmit response bandwidth must be no less than 3.5kHz.

Receiver Sensitivity: No less than -189dB at the resonant frequency.

Hydrostatic Pressure: 7MPa.

Measurement Data

There are two transducers, 202501# and 202502#. The measurement data is as follows.

Resistor and Capacitor Parameters

Transmitting voltage response and sound source level (dB)

202501#
f/kHz	d/m	U发/Vpp	U收/mVpp	M0/dB	SvL/dB	SL/dB
24	0.924	800	252	-217	146.3	195.3
25	0.924	800	290	-217	147.5	196.5
26	0.924	800	310	-217	148.1	197.1
27	0.924	800	330	-217	148.6	197.6
28	0.924	800	344	-217	149.0	198.0
29	0.924	800	344	-217	149.0	198.0
30	0.924	800	332	-217	148.7	197.7
31	0.924	800	316	-217	148.2	197.3
32	0.924	800	284	-217	147.3	196.3

202502#
f/kHz	d/m	U发/Vpp	U收/mVpp	M0/dB	SvL/dB	SL/dB
24	0.924	796	202	-217	144.4	193.4
25	0.924	796	232	-217	145.6	194.6
26	0.924	796	248	-217	146.2	195.2
27	0.924	796	259	-217	146.6	195.5
28	0.924	796	280	-217	147.2	196.2
29	0.924	796	285	-217	147.4	196.4
30	0.924	796	277	-217	147.1	196.1
31	0.924	796	262	-217	146.7	195.6
32	0.924	796	240	-217	145.9	194.9

Receiving sensitivity（dB）

f/kHz	202401#	202402#
24	-192.6	-192.3
25	-191.1	-191.1
26	-189.6	-189.8
27	-189.4	-189.3
28	-189.2	-188.7
29	-189.7	-189.2
30	-190.2	-189.7
31	-191.3	-191.0
32	-192.4	-192.2

Hydrostatic Pressure Test:

Afte hydrostatic pressure tests at 7 MPa/1 hour, 0 MPa/0.25 hour, and 7 MPa/1 hour, the insulation resistance between the positive and negative electrodes of both transducers was greater than 100 MΩ.

Application:

Underwater Acoustics Research

Acoustic Field Calibration

Military and Scientific Applications