The circuit system designed in this paper uses FPGA and single-chip microcomputer as the main chips. It VHDL language programming performs functional simulation verification of core control program through ModelSim software, finally, a storage-type dynamic measurement with one-to-multiple channels, adjustable trigger modes, optional sampling frequency is realized. At same time, further optimize...

Microphone array techniques can improve the acoustic sensing performance on drones, compared to use of a single microphone. However, multichannel sound acquisition systems are not available in current commercial drone platforms. We present an embedded and recording system with eight microphones mounted quadcopter. The is developed based Bela, computing for audio processing. record from multiple...

Separating technique for singing voice from music accompaniment is very useful in original sound type Karaoke instrument. We propose a real-time system to separate singing voice from music accompaniment for stereo recordings. Proposed algorithm consists of two stages. The first stage is a spectral change detector. The last stage is a selective vocal separation in frequency bins. Our system cons...

The performance of current virtual acoustic systems is highly sensitive to the geometry of individual ear at high frequencies. The objective of this paper is to study a virtual acoustic system which may not be sensitive to individual ear shape. The incident sound field around ear is reproduced by using a multi-channel headphone. The results of computer simulations show that the desired sound pr...

A new, small biomagnetic system with 8 channels operating at 77 K has been constructed. In the gantry inside the magnetically shielded room it can be shifted to five positions so that up to 40 positions can be measured successively. We employ low noise dc-SQUID magnetometers from high-temperature superconductors (HTS) to demonstrate mapping measurements of cardiac fields and measurements of som...

An adaptive nonparametric method is proposed for stable real-time detection of seismoacoustic sources in multichannel C-OTDR systems with a significant number of channels. This method guarantees given upper boundaries for probabilities of Type I and Type II errors. Properties of the proposed method are rigorously proved. The results of practical applications of the proposed method in a real C-O...