Open AccessEFFECTS OF PULSE LENGTH ON THE INTENSITY AND DECAY OF REVERBERATION
Author(s) -
Qiu Xinfang
Publication year - 1976
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.25.47
Subject(s) - reverberation , exponential function , intensity (physics) , attenuation , physics , exponential decay , saturation (graph theory) , pulse (music) , computational physics , optics , mathematics , mathematical analysis , acoustics , quantum mechanics , combinatorics , detector
In this paper starting with the general expression of the reverberation intensity for short pulses Ir(t,τ)=Kτt-me-βt, the corresponding exact expressions of the reverberation intensity for longer pulses are derived. The corresponding approximate formulae are also presented under the assumption that the exponential attenuation loss over the pulselength can be neglected. It is shown that, at short ranges, the reverberation intensity tends to saturation and decays inversely with the (m-l)st-power of the time t when the exponential attenuation coefficient β is small enough and the pulselength τ longer than the effective pulselength τm=amt(am decreases as m increases, and m is a real number greater than 2). Experimental results agree well with the theory.