scholarly journals Impact noise test method using a modified hammer machine

1975 ◽  
Vol 58 (S1) ◽  
pp. S4-S4
Author(s):  
Theodore J. Schultz
Keyword(s):  
Test Method ◽  
Impact Noise ◽  
Noise Test

Compressive Sensing Approach for Aeroengine Fan Noise Mode Detection

2018 ◽  
Author(s):  
Huanxian Bu ◽  
Wenjun Yu ◽  
Xun Huang
Keyword(s):  
Compressive Sensing ◽  
Sensor Array ◽  
Wind Tunnel Test ◽  
Test Method ◽  
Fan Noise ◽  
Noise Interference ◽  
Mode Detection ◽  
Flow Speeds ◽  
Noise Test ◽  
Set Up

To further simplify the sensor array set-ups and improve the mode detection capability for the aeroengine fan noise test, a new compressive sensing based methodology has been proposed. This paper reports the details of the validated aeroengine fan noise test method and the wind tunnel test results for the validation. The experimental set-up consists of a transition duct to the open jet, a mode synthesizer to generate different modes of characteristic fan noise, and a sensor array to conduct mode detection in the presence of background flow speeds and background noise interference. The main attention is primarily focused on the examination of the associated reconstruction accuracy and probability of success for spinning mode detection. The testing results clearly show the potential capability of the proposed new testing method for aeroengine tests in a practical testing facility.

Field impact noise test data on a concrete floor structure

1996 ◽  
Vol 100 (4) ◽  
pp. 2770-2770
Author(s):  
Roy L. Richards ◽  
Ioana Park
Keyword(s):  
Test Data ◽  
Concrete Floor ◽  
Impact Noise ◽  
Floor Structure ◽  
Noise Test

Low noise gradation design for micro-surfacing mix based on indoor noise test method

2016 ◽  
pp. 1059-1068
Author(s):  
Liping Cao ◽  
Shengqiang Liu ◽  
Xiangshen Hou ◽  
Ran Zhang
Keyword(s):  
Low Noise ◽  
Test Method ◽  
Noise Test

A Simplified Method for Field Measurement of Airborne Sound and Impact Sound Insulation in Buildings

1994 ◽  
Vol 1 (2) ◽  
pp. 137-149
Author(s):  
Liang Min ◽  
W.U. Dasheng ◽  
Zhang Xiying
Keyword(s):  
Field Measurement ◽  
Noise Source ◽  
Sound Level ◽  
Test Method ◽  
Sound Insulation ◽  
Octave Band ◽  
Level Measurement ◽  
Impact Noise ◽  
Simplified Method ◽  
Short Test

A simplified method is investigated to be developed for use by building control inspectors or persons undertaking a similar role to allow a fast and simple check to be carried out on both air-borne and impact sound insulation between rooms. This paper proposes a short test method, in which a standard impact noise source is employed as a simplified source and one third octave band sound level measurement is simplified by A-weighting.

Can Behavioral Speech-In-Noise Tests Improve the Quality of Hearing Aid Fittings?

2011 ◽  
Vol 7 (1) ◽  
pp. 8-14
Author(s):  
Robert Moore ◽  
Susan Gordon-Hickey
Keyword(s):  
Working Memory ◽  
Speech Perception ◽  
Performance Test ◽  
Hearing Aid ◽  
Speech Perception In Noise ◽  
Speech In Noise ◽  
Acceptable Noise Level ◽  
Perceptual Performance ◽  
Noise Test

The purpose of this article is to propose 4 dimensions for consideration in hearing aid fittings and 4 tests to evaluate those dimensions. The 4 dimensions and tests are (a) working memory, evaluated by the Revised Speech Perception in Noise test (Bilger, Nuetzel, & Rabinowitz, 1984); (b) performance in noise, evaluated by the Quick Speech in Noise test (QSIN; Killion, Niquette, Gudmundsen, Revit, & Banerjee, 2004); (c) acceptance of noise, evaluated by the Acceptable Noise Level test (ANL; Nabelek, Tucker, & Letowski, 1991); and (d) performance versus perception, evaluated by the Perceptual–Performance test (PPT; Saunders & Cienkowski, 2002). The authors discuss the 4 dimensions and tests in the context of improving the quality of hearing aid fittings.

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