| 摘要 |
<p>PURPOSE:To make the main pole range constant depending on the frequency of a received signal by employing a window function utilized for weighting a sensor array. CONSTITUTION:A plurality of sensors 9-K, 9-1... and 9K are arranged at a logarithmic interval. Outputs of the sensors are led out to output terminals 4-K, 4-1... and 4K through preamplifiers 2-K, 2-l... and 2K and then, equalizers 10-K, 10-1... and 10K. The equalizers 10-K, 10-1... and 10K standardize a window function used for weighting a sensor array so that the length of the sensor array becomes constant with respect to the wave-length of a received signal and a value obtained by correcting the value standardized with the distance between adjacent sensors used as gain.</p> |
