Perceptual discrimination of very high frequency components in wide frequency range musical sound

2009 ◽  
Vol 70 (7) ◽  
pp. 921-934 ◽  
Author(s):  
Toshiyuki Nishiguchi ◽  
Kimio Hamasaki ◽  
Kazuho Ono ◽  
Masakazu Iwaki ◽  
Akio Ando
Keyword(s):  
High Frequency ◽  
Wide Frequency Range ◽  
Perceptual Discrimination ◽  
Frequency Range ◽  
Very High Frequency ◽  
Musical Sound ◽  
Frequency Components ◽  
Very High

Measurement of very high frequency (VHF) sound in our daily experiences

2021 ◽  
Vol 263 (2) ◽  
pp. 4275-4282
Author(s):  
Koki Harusawa ◽  
Yumi Inamura ◽  
Masaaki Hiroe ◽  
Hideyuki Hasegawa ◽  
Kentaro Nakamura ◽  
...  
Keyword(s):  
Sound Source ◽  
High Frequency ◽  
Microphone Array ◽  
Sound Intensity ◽  
Wide Frequency Range ◽  
The Body ◽  
Very High Frequency ◽  
Pure Tones ◽  
Ventilation Duct ◽  
Very High

Recently, it is frequently reported that very high frequency (VHF) sounds are emitted from daily necessaries such as home electric appliances. Although we measured VHF sounds from home electric appliances in our previous study, the origins of such VHF sounds have not yet been identified. In the present study, we tried to identify the VHF sound source in each home electric appliance using a "sound camera", which visualizes the spatial distribution of the sound intensity using a microphone array. The sound camera visualized the location of the sound source at frequencies from 2 to 52 kHz with a field of view of 63 degrees. The sound camera elucidated that the VHF sounds were emitted from the power source of a LET light, the ventilation duct of an electric fan, and the body of an IH cooker. Their frequency characteristics were dependent on the sound source, i.e., combinations of pure tones in the LED light and distributing in a wide frequency range in the electric fan.

scholarly journals Magneto-dielectric properties of doped ferrite based nanosized ceramics over very high frequency range

2016 ◽  
Vol 19 (2) ◽  
pp. 911-916 ◽  
Author(s):  
Ashish Saini ◽  
Pravendra Kumar ◽  
Blaise Ravelo ◽  
Sebastian Lallechere ◽  
Atul Thakur ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
High Frequency ◽  
High Frequency Range ◽  
Frequency Range ◽  
Very High Frequency ◽  
Very High

scholarly journals Reconfigurable High Gain and Wide Band Antenna for 5G Communication

2020 ◽  
pp. 84-86
Author(s):  
Seethalakshmi V ◽  
Geetha S ◽  
Vetrichelvi G ◽  
Saranya G ◽  
Manikandan S
Keyword(s):  
Performance Analysis ◽  
Mobile Phones ◽  
High Frequency ◽  
Wide Band ◽  
High Gain ◽  
Frequency Range ◽  
Mobile Terminals ◽  
Very High Frequency ◽  
And Performance ◽  
Very High

This paper introduces the specification and performance analysis of broad frequency range antenna for 5 G mobile phones. The suggested antenna functions at the frequency spectrum of 28 GHz and its configuration are permanently matched over very high frequency bands, including 4.25 GHz, 7.055 GHz, 12.48 GHz and 15.26 GHz, as well as for the reallocation of the expanded 5 G spectrum of communications. Mobile terminals are compliant with the antenna that is being built.

A New Edge-Mode Isolator in the Very High Frequency Range

1976 ◽  
Vol 24 (3) ◽  
pp. 129-135 ◽  
Author(s):  
L. Courtois ◽  
N. Bernard ◽  
B. Chiron ◽  
G.E. Forterre
Keyword(s):  
High Frequency ◽  
High Frequency Range ◽  
Frequency Range ◽  
Edge Mode ◽  
Very High Frequency ◽  
Very High

scholarly journals Использование высокочастотной шумоподобной модуляции для снижения дрейфовых процессов в LiNbO-=SUB=-3-=/SUB=--фазовом модуляторе волоконно-оптического гироскопа

2020 ◽  
Vol 46 (19) ◽  
pp. 11
Author(s):  
Е.В. Востриков ◽  
Д.А. Погорелая ◽  
А.Н. Никитенко ◽  
А.С. Алейник
Keyword(s):  
High Frequency ◽  
Fiber Optic ◽  
Noise Signal ◽  
Frequency Noise ◽  
Phase Modulator ◽  
Fiber Optic Gyroscope ◽  
Frequency Range ◽  
Very High Frequency ◽  
High Frequency Noise ◽  
Very High

In this paper, the phase modulator optical phase drift reduction method is proposed and researched for LiNbO3 multi-functional integrated optical chip as a part of a fiber-optic gyroscope. This approach consists of applying a very high-frequency noise signal to a phase modulator in the range from 20 MHz to 100 MHz, which is outside of a fiber-optic gyroscope operating frequency range. The presented method showed that the increase in very high-frequency noise signal voltage up to around 1.7 half-wave voltages of the phase modulator allows decreasing optical phase drift by more than 4 times in the frequency range below 64.5 kHz.

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