scholarly journals Psycho-acoustical analysis of program feature of Symphonie Fantastique using Zwicker's sound quality parameters

2017 ◽  
Vol 36 (1) ◽  
pp. 78-87
Author(s):  
Haewook Chung ◽  
Soo-Ran Jeong ◽  
Cheolung Cheong
Keyword(s):  
Sound Quality ◽  
Quality Parameters ◽  
Acoustical Analysis

ENGINE SOUND COMFORTABILITY: RELEVANT SOUND QUALITY PARAMETERS AND CLASSIFICATION

2005 ◽  
Vol 38 (1) ◽  
pp. 61-66 ◽  
Author(s):  
T. Coen ◽  
N. Jans ◽  
P. Van de Ponseele ◽  
I. Goethals ◽  
J. De Baerdemaeker ◽  
...  
Keyword(s):  
Sound Quality ◽  
Quality Parameters

Sound quality parameters of an axial fan

2005 ◽  
Vol 118 (3) ◽  
pp. 1867-1867
Author(s):  
Mark A. Trautman ◽  
Willem M. Beltman
Keyword(s):  
Sound Quality ◽  
Quality Parameters ◽  
Axial Fan

Identification of Sound Quality Parameters With Respect to Subjective Feel of HVAC Noise of Diesel SUV’s

2012 ◽  
Author(s):  
Murali Bodla ◽  
Riyazuddin Mohammed ◽  
Rajesh Bhangale ◽  
Khumbhar Mansinh
Keyword(s):  
Power Plants ◽  
Sound Quality ◽  
Quality Parameters ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Subjective Rating ◽  
Sound Sources ◽  
Cabin Noise ◽  
Noise Function ◽  
Noise Measurements

Recent trends in developing quieter diesel power plants in automobiles leading to unmasking the secondary sound sources. One of the major secondary sound sources of in-cabin noise is HVAC system. HVAC noise is one such sound likely to be present as long as the automobile is in use. In extreme climatic conditions, like in India, HVAC is majorly operated at higher speeds and adding to that SUV volume requires more air circulation which generates lot of flow induced noise. Under these conditions, the contribution of HVAC noise is more significant for passengers and many a times it influences subjective cognition that causes the driver’s emotional response to be unpleasant, it is more important to identify the most significant sound quality parameters that contribute to the perception of HVAC noise. Measurements were done on five different diesel SUVs with different HVAC operating conditions each having variable fan speeds with engine on and off respectively. Using the semantic differential technique subjective rating of the measured signals has been done. The psycho acoustic parameters calculated objectively for the measured interior sounds later those were compared with subjective rating by using HVAC noise function (HNF) to obtain the suitable parameters to represent HVAC noise.

Comparison of Interior Jet Aircraft Noise using Sound Quality Parameters

2008 ◽  
Author(s):  
Samir N.Y. Gerges ◽  
Raquel F. Bitencourt ◽  
Camila Sato ◽  
Pascal Dietrich ◽  
J.L. Bento Coelho ◽  
...  
Keyword(s):  
Sound Quality ◽  
Quality Parameters ◽  
Aircraft Noise

A new sound quality metric for the design of engine exhaust mufflers

2017 ◽  
Vol 232 (2) ◽  
pp. 254-263
Author(s):  
Kuppam Pruthvi Kumar Reddy ◽  
Shahab Fatima ◽  
Amiya R Mohanty
Keyword(s):  
Sound Quality ◽  
Quality Parameters ◽  
Engine Exhaust ◽  
Postgraduate Students ◽  
Critical Dimensions ◽  
Quality Metric ◽  
Radiated Noise ◽  
Loudness Level ◽  
Institute Of Technology

In this paper, a study is made to determine the critical dimensions in the design of a family of reactive mufflers which significantly affect the sound quality of the tailpipe radiated noise. The sound quality parameters of the tailpipe noise such as the loudness level, the roughness and the tonality are measured, and a new sound quality metric is developed which can be used as an index to predict the performance of a muffler. The new sound quality metric was based on the evaluations of the synthesized tailpipe noise by a jury consisting of a few undergraduate and postgraduate students at the Indian Institute of Technology Kharagpur. Using the new sound quality metric, the parameters with the most influence on the design of the muffler can be determined. It was found that the length and the open area ratio of a concentric-tube resonator muffler have the highest impact on the tailpipe noise sound quality.

scholarly journals The efficiency of tram articulations compared to vibroacoustic emissions

2017 ◽  
Vol 44 (4) ◽  
pp. 55-63 ◽  
Author(s):  
Tomasz Nowakowski ◽  
Paweł Komorski ◽  
Franciszek Tomaszewski
Keyword(s):  
Sound Quality ◽  
Quality Parameters ◽  
Sound Perception ◽  
Friction Forces ◽  
Rail Vehicles ◽  
Urban Rail ◽  
Large Correlation ◽  
In Situ Conditions ◽  
Human Quality

Human quality of life is constantly increasing, and so does the comfort of travel by various means of public transport, especially rail transport. One of the more crucial criteria for assessment of travel comfort is vibroacoustic comfort. This aspect is also substantial among rail vehicle operators and manufacturers. Sound quality evaluation is related to psychoacoustic indicators, but reducing the levels of acoustic pressure does not always correlate to increased quality of the perceived sound and improvement of human sound perception. Moreover the cause of unpleasant noise has to be taken into consideration. In many examples it is induced by specific vibrations and/or friction forces through components. The following article presents experimental research carried out in the in-situ conditions, testing the quality of work carried out by tram articulations considering vibroacoustic emissions. Several measurements were taken of vibroacoustic signals in several urban rail vehicles of the same type. Two different trams were chosen for analysis and their vibroacoustic emission levels as well as sound quality parameters were compared. One of the more crucial aspects of the research was to determine the dependency between vibrations around the area of articulations and squealing noise. The results indicate a large correlation between signals and deterioration in the work quality of the articulation in the given tram. Moreover, the authors suggest expanding on currently carried out maintenance in order to minimise inconvenient vibroacoustic phenomena during use.

Monitoring of essential oils during storage by selected quality parameters

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
C Turek ◽  
S Ritter ◽  
F Stintzing
Keyword(s):  
Essential Oils ◽  
Quality Parameters
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