Application Cases

【Overview】
In this study, the Aigtek ATA-63120 power amplifier was used to build a water-tank acoustic radiation performance testing system. This research aims to investigate the enhancement effect of mutual radiation of multiple oscillators on the performance of ultra-low-frequency electrodynamic transducers.

Experiment Name: Theoretical Study on Mutual Radiation Effects of Multiple Oscillators and Experimental Analysis of Radiated Acoustic Power and Electroacoustic Efficiency of a Six-Element Oscillator Electrodynamic Transducer

Experiment Objective:
This study aims to explore the enhancement effect of mutual radiation of multiple oscillators on the performance of ultra-low-frequency electrodynamic transducers. By establishing an equivalent circuit model and fabricating a six-element oscillator prototype, the study focuses on validating the effectiveness of this structure in improving radiated acoustic power and electroacoustic efficiency, providing an efficient sound source solution for underwater unmanned platforms.

Testing Equipment:
Water-tank acoustic radiation performance testing system (transducer installation platform, underwater acoustic measurement sensor array, and data acquisition unit), power amplifier (ATA-63120), current excitation signal source, and computer data processing system.

Figure 1: Traditional Single-Element and Six-Element Oscillator Electrodynamic Transducers

Figure 2: Experimental Flowchart

Experimental Procedure:
This study systematically analyzes the performance of ultra-low-frequency electrodynamic transducers through theoretical modeling of mutual radiation in multiple oscillators and experimental validation. First, a finite element model was established to verify the acoustic characteristics of the six-element structure, confirming that the performance gain originates from the mutual radiation effect. Subsequently, prototypes of single-element and six-element oscillators were fabricated and tested in an anechoic water tank for comparative analysis. The experimental results demonstrate that the multi-element structure significantly enhances transmitting response, acoustic power, and electroacoustic efficiency, validating the effectiveness of the mutual radiation mechanism in overcoming the issue of low radiation resistance in ultra-low-frequency transducers, thereby providing a novel high-efficiency sound source solution for underwater platforms.

Experimental Results:
The six-element oscillator structure based on mutual radiation achieves a significant performance improvement in ultra-low-frequency sound sources. The transmitting current response is increased by approximately 15 dB, the maximum radiated acoustic power is increased by a factor of 41 compared to a single-element oscillator, and the electroacoustic efficiency is improved by approximately 6 times. In the 20–90 Hz test frequency range, the theoretical and experimental data are in good agreement, verifying the accuracy of the mutual radiation impedance model. This method operates stably in the ultra-low-frequency range, fully meeting the performance requirements of underwater unmanned vehicles for efficient, low-energy-consumption sound sources.

Figure 3: Test Results of Transmitting Current Response (TCR) of the Electrodynamic Transducer

Figure 4: Test Results of Electroacoustic Efficiency of the Electrodynamic Transducer and Their Ratio Relationship

Advantages of Aigtek Amplifiers in This Application:

1. Ultra-high power output capability – Achieves breakthrough improvements in radiated acoustic power and electroacoustic efficiency.

2. Stable ultra-low-frequency response – Ensures the accuracy of mutual radiation impedance model validation.

3. High output stability and long-term reliability – Supports the iterative论证 (论证, verification) of experimental data.