New Frequency Estimation Algorithm for Effectively Eliminating Time-Varying Multi-Tone Noise

A research team led by Prof. YANG Jun from the Institute of Acoustics (IOA) of Chinese Academy of Sciences proposed a newfrequency estimation algorithm based on a parallel notch filter structure, to track the frequencies of the noise signal w...

Novel Acoustic Target Feature Analysis Method Based on Image Pattern Recognition Technique

Recently, researchers from the Institute of Acoustics (IOA) of the Chinese Academy of Sciences, together with researchers from France, proposed a novel acoustic target feature analysis method based on image pattern recognition technique, whic...

Novel Wideband Dipole Logging Method Based on the Segment Linear Frequency Modulation Excitation

To obtain the broadband flexural wave dispersion, Dr.CAO Xueshen and his colleagues from the Institute of Acoustics (IOA) of the Chinese Academy of Sciences proposed a new wideband dipole-logging method based on the segment linear frequency m...

New Wave Field Separation Method for Imaging around the Horizontal Borehole

Researchers Propose A Fast Eigen-Based Signal Combining Algorithm by Using CORDIC