Sound Measurement Package

Measurement of sound propagation in glass wool

Sound velocity measurement using transfer function method

Abstract The transfer function of a piezoelectric transducer, buffer rod and sample assembly is used to measure the sound velocity of solid materials. From the recorded transfer function, pulse echo patterns at frequencies of the passband of the input signal are reproduced after convoluting with monochromatic RF input signals. The time delay is obtained by performing pulse echo overlap and phas...

Psychological measurement for sound description and evaluation

Several domains of application require one to measure quantities that are representative of what a human listener perceives. Sound quality evaluation, for instance, studies how users perceive the quality of the sounds of industrial objects (cars, electrical appliances, electronic devices, etc.), and establishes specifications for the design of these sounds. It refers to the fact that the sounds...

Development and Validation of Sound Transmission Loss Measurement System for Measuring Muffler Performance

Muffler is a part of the vehicle exhaust system that absorb or reflect sound waves to reduce exhaust noise. One of the most important determinants of a muffler performance is the amount of attenuation that has on its input wave; this parameter is known as sound transmission loss. Four - mic standard test is one way to determine this parameter which is used in this paper. In this study, a test d...

Research on Measurement of Software Package Dependency based on Component

Dependence between software packages is of importance to influence the extendibility and stability of system. In existing programs, dependence mainly manifests for class and component. Here, it has the important guiding sense to our system construction and programming. This paper analyzed the dependency between software packages, and designed the algorithm for detection existence of the package...