Tiredness by noise

Though the additional rubber sheet application increased the engine and trans-axle noises insulation on the rear fire wall of the VW 1302 Super Beetle, the sound and vibrations from shift lever is highlighted this time.

This kind of trial should be performed by the manufacture's developing division, so again I realized. The improvement on some part causes the destruction of sound insulation balance by the factory design.

Anyway this kind of insulation must be tried until the drive should not be suffered from the tiredness after driving an automobile, because not only vibration but also noisy circumstance could cause driver's fatigue.

I just remembered 40 years ago, I had been an owner of 1200 VW Beetle Standard Model that had no insulator on oblique fire wall surface. Also I remembered the sound of silence after the motor stopped.