Experimental Study on the Effects of Pickguard Material on the Sound Quality of Electric Guitars

Abstract We re-assess the gender system of Ogbe-Oloma, an Edoid village variety of Nigeria. System exponents are prefixes that define form class and reflect grammatical number. We find that eight agreement classes undergird fourteen genders, while seventeen nominal form classes frame twenty-five number inflections. Prefix mapping from inflection to gender is non-isomorphic. Mapping is however constrained by syllable shape, CV- versus V-, and alliterative sound quality of prefix consonant, not vowel. In addition, several number inflections trigger agreement in multiple genders leading to one gender that exclusively refers to nouns with human reference.

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Dimension analyses of perceived sound quality of sound-reproducing systems

Scandinavian Journal of Psychology ◽

10.1111/j.1467-9450.1979.tb00697.x ◽

1979 ◽

Vol 20 (1) ◽

pp. 159-169 ◽

Cited By ~ 8

Author(s):

ALF GABRIELSSON

Keyword(s):

Sound Quality

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The effects of dementia care mapping on nursing home residents’ quality of life and staff attitudes: design of the quasi-experimental study Leben-QD II

BMC Geriatrics ◽

10.1186/1471-2318-13-53 ◽

2013 ◽

Vol 13 (1) ◽

Cited By ~ 11

Author(s):

Margareta Halek ◽

Martin Nikolaus Dichter ◽

Tina Quasdorf ◽

Christine Riesner ◽

Sabine Bartholomeyczik

Keyword(s):

Quality Of Life ◽

Experimental Study ◽

Nursing Home ◽

Nursing Home Residents ◽

Dementia Care ◽

Staff Attitudes ◽

Quasi Experimental ◽

Care Mapping ◽

Dementia Care Mapping

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Population size, search space and quality of solution: an experimental study

The 2003 Congress on Evolutionary Computation, 2003. CEC '03. ◽

10.1109/cec.2003.1299920 ◽

2004 ◽

Cited By ~ 9

Author(s):

R.A. Sarker ◽

M.F.A. Kazi

Keyword(s):

Experimental Study ◽

Population Size ◽

Search Space

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The Potential Effect of Mucuna pruriens Seed Extract on Sperm Quality experimental study on mice exposed to cigarette smoke

Bangladesh Journal of Medical Science ◽

10.3329/bjms.v20i4.54132 ◽

2021 ◽

Vol 20 (4) ◽

pp. 768-773

Author(s):

Meidona Nurul Milla ◽

Yani Istadi ◽

Vania Shaula ◽

Deastri Anjeas Wari ◽

Chntyia Dwi Cahyani Puspitasari ◽

...

Keyword(s):

Experimental Study ◽

Cigarette Smoke ◽

Sperm Quality ◽

Medical Science ◽

Seed Extract ◽

Reproductive Age ◽

Testicular Atrophy ◽

Mucuna Pruriens ◽

Control Group

Background: Infertility has been more common problems among couple of reproductive age. One of the factors causing this disorder is unhealthy environmental factors including exposure to cigarette smoke. Polynuclear aromatic hydrocarbons (PAHs) in cigarette smoke can cause testicular atrophy, while the free radicals can inhibit the stages of spermatogenesis, and nicotine in cigarettes affects the brain dopamine levels affecting the levels of GnRH, and subsequently affect the levels of FSH and LH needed in spermatogenesis. The use of Mucuna pruriens seed extract containing antioxidants and L-dopa is expected to improve the quality of sperm after exposure to cigarette smoke. Objective: This study aimed to determine the effect of Mucuna pruriens seed extract on the sperm quality in mice exposed to cigarette smoke. Methods: This study was an experimental study with a post test only control group design. A total of 20 mice were divided into 4 groups of five mice each. All groups were exposed to cigarette smoke. Group 1 was the negative control exposed to cigarette smoke. Groups 2, 3, 4 were exposed to cigarettes smoke and given Mucuna pruriens seed extracts at the dose of 250; 300; and 350 mg/Kg BW/day. Parameters of sperm quality included concentration, morphology, motility and viability. Results: Post hoc tests showed there were significant differences among treatment groups. Conclusion: the administration of Mucuna pruriens seed extract affects the sperm quality of BALB/c mice exposed to cigarettes smoke. Bangladesh Journal of Medical Science Vol.20(4) 2021 p.768-773

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Sound Quality of Aircraft Cabin for VIP and Business Jets

ASME 2018 Noise Control and Acoustics Division Session presented at INTERNOISE 2018 ◽

10.1115/ncad2018-6128 ◽

2018 ◽

Author(s):

Nurkan Turkdogru Gurun ◽

Hemang N. Sheth

Keyword(s):

Prediction Model ◽

Paired Comparison ◽

Semantic Differential ◽

Sound Quality ◽

Subjective Perception ◽

Subjective Test ◽

Aircraft Cabin ◽

Listening Tests ◽

Potential Customers

This paper aims to identify the attributes that describe aircraft interior noise, determine most important psychoacoustic models that characterize cabin sounds, and construct a prediction model that can be utilized for VIP and business jets to evaluate subjective perception. In the first part, paired comparison listening tests and free verbalization are conducted with expert subjects who experienced VIP and business aircraft flight. The study generated a list of adjective pairs that describe perception of cabin sounds to be used for semantic differential listening tests. Multi-dimensional scaling is performed on paired comparison data. Results showed that subjects’ decisions can be categorized in loudness and annoyance dimensions which are not necessarily linearly associated. The second part of the study is the development of a sound quality prediction model for aircraft cabin. Semantic differential tests are conducted with potential customers. Objective sound quality metrics are correlated to subjective test responses using principal components regression. This model is found to be most effective explaining pleasantness, comfort, and loudness perception. It is intended to be utilized to modify/redesign noise control treatments and sound signature of an aircraft. All listening tests were conducted inside an aircraft cabin simulator considering the influence of visual content.

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A Semantic Differential for Evaluating the Sound Quality of Fan Systems

Volume 1: Aircraft Engine; Fans and Blowers; Marine; Honors and Awards ◽

10.1115/gt2017-63172 ◽

2017 ◽

Author(s):

Carolin Feldmann ◽

Thomas Carolus ◽

Marc Schneider

Keyword(s):

Principal Component ◽

Semantic Differential ◽

Sound Quality ◽

Heat Pumps ◽

First Case ◽

Objective Metrics ◽

Main Components ◽

Air Conditioning Systems ◽

The University

Fans are main components e.g. in heating, ventilating and air conditioning systems for vehicles or buildings, cooling units of engines and electronic circuits, and household appliances such as kitchen exhaust hoods or vacuum cleaners. End-users increasingly demand a high sound quality of their system or device. The overall objective of a recent research project at the University of Siegen is a multidimensional assessment of fan sound quality. In a first step an advanced novel semantic differential for the assessment of fan-related sounds is established with the aid of carefully designed jury tests. Eventually, this semantic differential is employed for sound quality jury tests of fans in kitchen exhaust hoods, heat pumps and air purifiers as a first case. Finally, a prediction model is suggested, which relates the outcome from the jury tests to objective metrics. A principal component analysis is carried out and yields five main assessment criteria with 23 relevant adjective scales. The results show that the perceived sound quality of fan systems is mainly determined by the loudness and tonality of the sound. The spectral content (represented by the sharpness) as well as the time structure (represented by the roughness) have no significant impact on perceived sound quality of the fan systems investigated.

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