Cate's Research-Investigation Bureau

This is an introduction to noise characteristics of Soviet/Russian armoured fighting vehicles.  Vibrations, moving parts, and suspension all contribute to the internal noise level of a vehicle. These factors create oscillations that propagate through other modules increasing noise levels. To measure noise characteristics inside tanks, the driver's position and the turret crew's positions are measured separately. Units of measurement used for this are dB, dBA, octaves and Herz along with 2 different spectrums of sound; Level of sound pressure (LSP) "УЗД (Уровень звукового давления)" and level of sound (LS) "УЗ (Уровень звука)".  Unspecified variants of T-64, T-72 and T-80 and a T-80UD were chosen. The charts below show the dB/dBA levels for the different crew positions relative to the speed at which the tanks are moving. Tests were carried out on a concrete track. Lines 1-4 indicate LSP values for T-64/T-72/T-80 and T-80UD, while lines 5-8 indicate LS val...