Omnidirectional (Spherical) Acoustic Transducers Posted by Business Development Manager September 17th, 2018

Omnidirectional (Spherical) Acoustic Transducers

Spherical acoustic transducers are ideal for applications requiring a truly omnidirectional response. For most common transducer designs, the beam angle narrows at higher frequencies. (This may be useful for some applications. See Directional Acoustic Transducers.) Spherical transducers, on the other hand, are fully omnidirectional at any frequency. Systems designers often call on them for communications applications, such as acoustic modems, positioning systems and to serve as artificial targets.

SX147
17 kHz spherical transducer SX147

Technical Specification

RESONANCE FREQUENCY
17 kHz

BEAM ANGLE RADIAL 3DB AT FR
Omnidirectional (Spherical)

BEAM ANGLE AXIAL 3DB AT FR
Omnidirectional (Spherical)

DEPTH RATING
1250 m

TRANSMIT VOLTAGE RESPONSE TVR
148 dB re 1 µPa/V @ 1m

SX149
33 kHz spherical transducer (SX149)

Technical Specification

RESONANCE FREQUENCY
33 kHz

BEAM ANGLE RADIAL 3DB AT FR
Omnidirectional (Spherical)

BEAM ANGLE AXIAL 3DB AT FR
Omnidirectional (Spherical)

DEPTH RATING
1250 m

TRANSMIT VOLTAGE RESPONSE TVR
149 dB re 1 µPa/V @ 1m

SX89
67 kHz spherical transducer (SX89)

Technical Specification

RESONANCE FREQUENCY
67 kHz

BEAM ANGLE RADIAL 3DB AT FR
Omnidirectional (Spherical)

BEAM ANGLE AXIAL 3DB AT FR
Omnidirectional (Spherical)

DEPTH RATING
40 m

TRANSMIT VOLTAGE RESPONSE TVR
143 dB re 1 µPa/V @ 1m

SX76

Technical Specification

RESONANCE FREQUENCY
180 kHz

BEAM ANGLE RADIAL 3DB AT FR
Omnidirectional

BEAM ANGLE AXIAL 3DB AT FR
Omnidirectional (Hemispherical)

DEPTH RATING
100 m

TRANSMIT VOLTAGE RESPONSE TVR
120 dB re 1 µPa/V @ 1m

The piezoelectric ceramic sphere used to build a spherical transducer offers other advantages. Inherently, spheres are mechanically robust. As a result, spherical transducers provide good depth ratings, often in excess of 1000m. They are also tolerant of explosive shock. Spherical acoustic transducers tend to provide a broadband response and high efficiencies.

We can design a spherical transducer to meet your frequency specification and can integrate a preamp to increase receive sensitivity. Housing, mounting, wiring, connector type and other mechanical and electrical characteristics can also be fully customized. Contact Sensor Technology Ltd. to discuss your specific requirements.