In the electrical network power transformers play a key role in transmission and distribution of electrical energy. Noise emissions on power transformers will be supervised in Germany strictly according to the German Federal Immission Control Act (Bundes-Immissionsschutzgesetz) [1] and are a challenge for the utilities to fulfill the therein stated requirements. When in operation power transfor...

in this study, an intelligent system for sorting closed shell and open shell pistachio nuts, was designed and developed based on combined acoustic and artificial neural network (ann) techniques. the system included a microphone, pc, material handling equipment and an air reject pneumatic mechanism. the microphone, placed under the steel plate, received sound signals generated by the pistachio n...

In the search for utilization of unburned carbon from flyash, flotation has been considered by many as a possible method for reclaiming the carbon. Due to the ever-increasing need to minimize landfill materials and reutilize waste streams, NETL has reviewed flyash flotation techniques in an effort to develop a methodology for determining the floatability potential of the carbonaceous material. ...

We have so far proposed a speaking-aid system for laryngectomees using a statistical voice conversion technique. In the proposed system, artificial speech articulated with extremely small sound source signals is detected with a Non-Audible Murmur (NAM)microphone, and then, the detected artificial speech is converted into more natural voice in a probabilistic manner. Although this system basical...

This paper presents a sound-source-direction estimation method using only a single microphone with a parabolic reflection board. A simple signal-power-based method using a parabolic antenna has been proposed in the radar field. But the signal-power-based method is not effective for finding the direction of a talking person due to the varying power of the uttered speech signals. In this paper, t...

This paper proposes a robust sound event classification method, based on a selective image feature driven from the novel subband power distribution (SPD), which represents the distribution of power over frequency components. This method is an extension of our previous work, which was motivated by the visual perception of the spectrogram to produce a robust feature for sound classification. Unli...