Technical Report
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What is dB?Decibels (dB) are used in various fields such as electricity, communication, optics, acoustics, and vibration. Here, we summarize the basic definition of decibels (dB), their significance, convenience, and how they are used in different fields.
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About the FFT AnalyzerTo grasp the meaning of the data displayed by the FFT analyzer, it is necessary to understand the concept of Fourier series, which is the basic idea of FFT, and its mathematical background.
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What is fluctuation sound analysis?By using a metric (variability sound analysis) that quantifies various time-varying components based on loudness, it becomes possible to quantify not only the timbre (pitch) of sound but also its temporal variation cycles.
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What is sound quality evaluation?Sound quality evaluation is a technique that uses psychoacoustic technology to quantitatively analyze sound according to human perception. By analyzing sound quality with sound quality evaluation technology and advancing sound improvement techniques, it is also possible to transform sounds into pleasant and gentle natural sounds.
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About sound and its sensorsWhen measuring sound, the frequency characteristics and their magnitude are the subjects of interest. As you may know, the unit of measurement for frequency is 'Hz'. The magnitude of sound is measured on a logarithmic scale due to its very wide range of variation.
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About ultrasonic vibration measurements of wire bonding using a Laser Doppler Vibrometer.In wire bonding, the method that utilizes ultrasound is common, and the state of ultrasonic vibration application is an important parameter that influences the quality of bonding.
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Vibration and its sensorsVibrations can be broadly classified into the following three categories based on their characteristics.
●Linear vibrations
●Bending vibrations
●Torsional vibrations -
coefficient representing vibration dampingSince it is labor-intensive and costly to implement measures after vibrations occur, it is important to conduct thorough considerations regarding vibrations during the design of machinery and to implement measures to prevent or reduce vibrations.
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What is a sound level meter?The sound level meter has become a familiar device for easily measuring noise, while also increasing in importance as an environmental measuring instrument.
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About vibration-damping materials and their performance measurement."Vibration control" refers to a technology that converts the vibrational energy of solid surfaces into thermal energy, thereby reducing the vibrations of those surfaces.
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Frequency Ratio Analysis and Tracking AnalysisFor a rotating machine that must cover a wide range of rotational speeds from low to high, the resonance between the natural frequencies of each component that makes up the machine and the rotational speed becomes an important issue.