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Vibration on poultry transporters.

1. This research established the magnitudes and frequencies of vibration acceleration on two typical broiler bird transporters, one with leaf and the other with air suspension. 2. Vibration measurements were made using triaxial accelerometers mounted on the chassis and in the bird containers, with vehicles both loaded and unloaded. 3. In the vertical axis the fundamental vehicle frequency is between 1 and 2 Hz with a secondary peak at 10 Hz. 4. In the lateral axis with air suspension, the maximum level of vibration on the chassis occurred at 12 to 18 Hz; this was less evident with leaf suspension. 5. The magnitudes of vibration acceleration occurring in the bird containers would be fairly uncomfortable for the seated human. Frequency weightings and response to different axes and magnitudes of vibration must be established before the response of birds can be predicted.