Short-period infrasonic-noise spatial coherence

Abstract

A new method for treating the problem of infrasonic-noise spatial coherence with relation to a noise-reducing array design is developed. The behavior of this coherence at Peñas, Bolivia (4000 m above sea level), is investigated. The optimum spacing between sampling inlets for that particular location seems to be approximately 12 m at this preliminary stage of the work. The noise recorded with a two-inlet noise-reducing array at a 12-m separation was 40% less than that using only one inlet.