Document ID (ISN) | 47682 |
CIS number |
87-642 |
ISSN - Serial title |
0201-7296 - Kuznečno-štampovočnoe proizvodstvo |
Year |
1986 |
Convention or series no. |
|
Author(s) |
Kramarenko R.A., Timofeev I.R. |
Title |
Tests with devices that reduce the airflow noise produced by drop forging hammers |
Original title |
Ispytanija ustrojstv, snijajuščih aėrodinamičeskij šum, sozdavaemyj štampovočnym molotom [in Russian] |
Bibliographic information |
June 1986, No.6, p.29-30. Illus. 3 ref. |
Abstract |
Results of tests carried out on sound absorbing devices of the "active" and "passive" types. During the experiments, the air pressure and impact noise level were measured at different points inside and outside enclosures made up of reinforced plastic panels lined with antidrumming compound and plastic foam (active absorption) and close to plastic screens arranged and inclined in various ways (passive absorption). According to the shape of the absorption "channel" made up by the active enclosures, the impact noise was reduced by 7 to 15dB, while the screens enabled a reduction of 9 to 14dB to be obtained. |
Descriptors (primary) |
airflow noise; impact noise; sound absorption; forging hammers; drop forging |
Descriptors (secondary) |
description of equipment; acoustic enclosure; noise control; screens |
Document type |
D - Periodical articles |
Subject(s) |
Noise, hearing and vibration
|
Broad subject area(s) |
Physical hazards
|
Browse category(ies) |
Foundries, metalcasting and forging operations Noise
|