MassaSonic - Sub-Bottom Profiling Transducer

The transducers are designed to be driven with a maximum input power of 600 Watts using up to a 30% duty cycle, or 200 Watts maximum for continuous operation. In shallow water, the maximum output is cavitation limited. Minimum water depths of approximately 30 and 100 feet are recommended for input power of 200 and 600 Watts respectively to avoid cavitation.

All of the transducers in the family utilize the same resonant structure containing a circular piston for the radiating source that is Vi wavelength in diameter at 4 KHz. The transducers are designed to be bolted directly through their 4-corner integral shock mounts to a simple frame structure. This modular design allows the transducers to easily be assembled into arrays to achieve any desired beam pattern and source level. Each transducer is terminated with a Massa C1F2 Female Underwater Connector and has a locking ring included. Mating C1M2 Male Connectors can be purchased separately.

The TR-1075E consists of the basic resonator with no electrical tuning. Its nominal frequency of resonance is 3.5 KHz. Massa has fabricated TR-1075 Transducers with a wide variety of different internal tuning networks. They have included transformers to produce different output impedance magnitudes. Transducers have been made with both series and parallel tuning to produce a nominal phase angle of 0 at different frequencies. A separate inductor is required for series tuning, while the inductance of the primary windings of the transformer is used for parallel tuning.

In some cases, damping resistors have been connected across the transducer to lower its Q, which allows the use of a short tone burst excitation pulse with reduced sensitivity for operation when very close to the sea floor. These transducers can be driven with greater input power because some of the energy is dissipated by the resistor. Massa can customize a tuning network to meet any requirement, but one of the standard models will usually meet the needs of most of our customers.

• Sub-Bottom Profiling 
• Bottom Mapping