Electroacoustics. Audio-frequency induction loop systems for assisted hearing

2015 ◽  
Keyword(s):  
Audio Frequency

Three-dimensional inversion of controlled-source audio-frequency magnetotelluric data based on unstructured finite-element method

2020 ◽  
Vol 17 (3) ◽  
pp. 349-360
Author(s):  
Xiang-Zhong Chen ◽  
Yun-He Liu ◽  
Chang-Chun Yin ◽  
Chang-Kai Qiu ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Three Dimensional ◽  
Audio Frequency ◽  
Magnetotelluric Data ◽  
Controlled Source ◽  
Element Method

Dielectric Loss in Vanadyl Pnictates

1990 ◽  
Vol 210 ◽  
Author(s):  
Joseph F. Lomax ◽  
John J. Fontanella ◽  
Mary C. Wintersgill ◽  
Anthony Kotarski
Keyword(s):  
Dielectric Loss ◽  
Complex Impedance ◽  
Audio Frequency ◽  
Vanadyl Phosphate ◽  
Nonstoichiometric Compound ◽  
Proton Movement ◽  
Related Compounds ◽  
Water Species ◽  
Acid Nature ◽  
Chemical Evidence

AbstractThe results of audio frequency complex impedance studies for vanadyl phosphate and its hydrates (VOPO4*nH2O;n=0,1,2) are reported. Measurements were made at seventeen frequencies between 10 and 105 Hz over the temperature range 5.5-380K. Two lowtemperature features were observed and are correlated with particular water species between the VOPO4 layers. In light of chemical evidence and compleximpedance measurements on related compounds, it is speculated that VOPCO4*nH2O (Pc = P, As) can be thought of as a mixed nonstoichiometric compound [VO(HPcO4)]x[VOPcO4O4]1-x*nH2O and the solid Brϕnsted acid nature of the compound is related to proton movement between layer pnictates and intralayer waters.

Sign in / Sign up

Export Citation Format

Share Document