OVERTON-RESONANT SINGING BASIS OF COMPOSITOR LANGUAGE (OVERTONE-RESONANT BASIS OF COMPOSITOR LANGUAGE)

The article substantiates the embodiment of the traditional overtone intonational song beginning in the composer’s work. The application of the main acoustic features of an authentic timbre is described, such as compression, the presence of «specific resonances», reliance on the vocal position and inharmonic overtones. The main composer’s task is to create a piece of music that would imitate or reproduce the resonance characteristic of the folk singing tradition — the overtone. The research is based on the method of sound-acoustic measurement of an audio signal. The work was performed using the Reaper V4,581 audio editor software (Digital Audio Workstation) and a spectrograph built into the Reaper brand iZotop Ozon5 Advansed. This model of the spectrograph allows you to see the spectrogram of the investigated audio material in 3D format and color image, which more accurately reflects the measurements of the vibration frequency of the sound wave, and is also equipped with a broadband FFT analyzer. The scientific novelty of the research lies in the consideration of composer folklorism from the point of view of the timbre acoustic model of authentic singing, and the adaptation of expressive means is investigated not within the framework of the style and manner of the melodic presentation of the material of individual composers, but from the point of view of the timbre content of the folklore voice. The article shows how the influence of ethno-singing on composer’s creativity is revealed through the prism of authentic timbre and the given spectral examples.

Design of Tunable Terahertz Metamaterial Sensor with Single- and Dual-Resonance Characteristic

We present two types of refractive index sensors by using tunable terahertz (THz) metamaterial (TTM) based on two concentric split-ring resonators (SRRs) with different splits. By modifying the distance between SRRs and substrate, TTM shows tunable single- and dual-resonance characteristic. The maximum tuning range of resonance is 0.432 THz from 0.958 THz to 1.390 THz. To demonstrate a great flexibility of TTM in real application, TTM device is exposed on the surrounding ambient with different refractive index (n). The sensitivity of TTM can be enhanced by increasing SRR height, which is increased from 0.18 THz/RIU to 1.12 THz/RIU under the condition of n = 1.1. These results provide a strategy to improve the sensing performance of the metamaterial-based sensing device by properly arranging the geometric position of meta-atoms. The proposed TTM device can be used for tunable filters, frequency-selective detectors, and tunable high-efficiency sensors in the THz frequency range.

Low-Frequency Characterization of Music Sounds - Ultra-Bass Richness From the Sound Wave Beats

The orchestra performance is full of sublime rich sounds. In particular, the unison of violins sounds different from the solo violin. We try to clarify this difference and similarity of unison and solo numerically analyzing the beat of ‘violins‘ with timbre, vibrato, melody, and resonance. Characteristic properties appear in the very low-frequency part in the power spectrum of the wave amplitude squared. This ultra-buss richness (UBR) can be a new characteristic of sound on top of the well-known pitch, loudness, and timbre, although being inaudible directly. We find this UBR is always characterized by a power-law at low-frequency with the index around −1 and appears everywhere in music and thus being universal. Furthermore, we explore this power-law property towards much smaller frequency regions and suggest possible relation to the 1/f noise often found in music and many other fields in nature.