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Nor279 Impact ball
Nor279 Impact ball s a product developed for use as an impact source for measurements of impact sound insulation performance – for example of floors in collective housing.
Features
- Hollow sphere ball
- Outside diameter 178mm and thickness 32mm
- Silicone rubber material
- Equivalent mass 2,5 kg (+/- 0,1kg)
- Coefficient of restitution at 0,8 (+/- 0,1)
- Rubber hardness 40o (+/- 5o)
Standards
- ISO 10140-3:2021
- ISO 10140-5 Annex F:2021
- ISO 16283-2:2020
- JIS A 1418-2
Specifications
Rubber raw material: Silicon rubber
Shape: Hollow sphere, diameter 178 ±1 mm, wall thickness 32 mm
Equivalent mass: 2.5 ±0.1 kg
Rebound coefficient: 0.8 ±0.1
Rubber hardness: 40º ±5º
Impact force characteristics: Impact force waveform (Example)
