Nor279

The impact ball is designed in accordance with the requirements of the laboratory Standard ISO 10140-3 Measurement of impact sound insulation and the field Standard ISO 16283-2 Field Measurement of impact sound insulation.

The Nor279 Impact Ball is developed for use as an impact source for measurements of impact sound insulation performance - for example of floors in collective housing.

The method of operation is to drop the Impact Ball in a vertical free fall from a height of 100cm measured from the bottom of the rubber ball to the surface of the floor. After the drop, the ball shall be captures in order to avoid multiple impacts on the floor. Minimum four rubber ball positions shall be used for the test measurement.

The rubber ball generates an impact force in the octave bands from 31,5 Hz to 500 Hz. Hence, it's primary use is for checking out the low frequency performance of the floor under test.

Specifications:

• 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)

Downloads:

Product data Norsonic Nor279 impact ball

impact force waveform

impact force exposure level