Comparison of the effects of sinusoidal and stochastic octave-band-wide vibrations — a multi-disciplinary study

✍ Scribed by R. Bastek; Ch. Buchholz; E. I. Denisov; G. Enderlein; H. Kramer; N. N. Malinskaja; A. Meister; A. Metz; R. Mucke; A. Rhein; R. Rothe; H. Seidel; Ch. Sroka

• Publisher: Springer-Verlag
• Year: 1977
• Tongue: English
• Weight: 477 KB
• Volume: 39
• Category: Article
• ISSN: 0340-0131
• DOI: 10.1007/bf00405659

✦ Synopsis

Part I Investigations with sinusoidal and stochastic octave-band-wide az-vibration with the frequencies or mid-band frequencies 2, 4, and 8 Hz, respectively, and the same r m s of the vibration acceleration for both modes of vibration and a 30-minute exposure are reported In order to assess the effect, measurements of the transmission, vibration-related changes of the electromyogram of the dorsal muscles, the regulation of the body-posture (stabilography), the vestibular galvanic excitability, and psychically regulated performances were used.

With a controlled unrestrained body-posture the transmission is lower at the intensities I 1 ( 2 Hz 2 4 m/s 2 ; 4 Hz 1 7 m/s 2 ; 8 Hz 1 7 m/s 2 ) than at the intensities 12 ( 2 Hz 1 2 m/s 2 ; 4 Hz 0 85 m/s 2 ; 8 Hz 0 85 m/s 2 ) With the resonance frequency 4 Hz this non-linearity is particularly marked A systematic difference between sinusoidal and stochastic vibration is not observed with regard to the transmission Only stochastic vibration of 4 Hz -0.85 m/s 2 is more strongly damped than sinusoidal vibration of the same r m s.