ANNEX IIIMETHOD OF MEASUREMENT OF AIRBORNE NOISE EMITTED BY EQUIPMENT FOR USE OUTDOORS
28.HYDRAULIC HAMMERS
Operating conditions during tests
Period of observation/determination of resulting sound power level
Definitions
d | Tool diameter (mm) |
d1 | Anvil diameter, 1 200 ± 100 mm |
d2 | Inner diameter of the anvil support structure, ≤ 1 800 mm |
d3 | Diameter of the test block deck, ≤ 2 200 mm |
d4 | Diameter of the tool opening in the deck, ≤ 350 mm |
d5 | Diameter of the tool seal, ≤ 1 000 mm |
h1 | Visible tool length between the lowest part of the housing and tool seal upper surface (mm), h1 = d ± d/2 |
h2 | Tool seal thickness above the deck, ≤ 20 mm (if the tool seal is located below the deck, its thickness is not limited; it may be made of foam rubber) |
h3 | Distance between deck upper surface and anvil upper surface, 250 ± 50 mm |
h4 | Isolating foam rubber deck seal thickness, ≤ 30 mm |
h5 | Anvil thickness, 350 ± 50 mm |
h6 | Tool penetration, ≤ 50 mm |
If the quadratic shape of the test block structure is used, the maximum length dimension equals 0,89 × corresponding diameter
The empty space between the deck and the anvil can be filled with elastic foam rubber or other absorption material, density < 220 kg/m3