Influence of sound pressure and grazing flow on the acoustic resistance of resonator orifice

2020 ◽  
Vol 2020 (0) ◽  
pp. J10206
Author(s):  
Takayasu TORIGOE ◽  
Shotaro YAMAZAKI ◽  
Keisuke MIYASHITA ◽  
Ko NAKAYAMA ◽  
Tomohito NAKAMORI ◽  
...  
Keyword(s):  
Sound Pressure ◽  
Acoustic Resistance ◽  
Grazing Flow

Lattice Boltzmann simulation of acoustic resistance in microchannels

2015 ◽  
Vol 29 (16) ◽  
pp. 1550104 ◽  
Author(s):  
Dong Guan ◽  
Jiu Hui Wu ◽  
Li Jing ◽  
Kuan Lu
Keyword(s):  
Lattice Boltzmann ◽  
Sound Pressure ◽  
High Efficiency ◽  
Pressure Variation ◽  
Physical Parameters ◽  
Mesoscopic Scale ◽  
Lattice Boltzmann Simulation ◽  
Acoustic Resistance ◽  
Boltzmann Method ◽  
Variation Simulation

Lattice Boltzmann method (LBM) is utilized to model the acoustic resistance in microchannels at mesoscopic scale in this paper. Sound pressure distribution at different positions are studied. A number of physical parameters, such as the wavelength, channel number, channel width and length are investigated to find their effects on pressure variation. Simulation results are compared with those obtained by traditional methods and demonstrate that the LBM is a helpful approach to study sound attenuation in microchannels at mesoscopic scale. These results have potential application for designing the high-efficiency sound absorbers.

Acoustic Resistance of an Orifice at High Sound Pressure Levels

2018 ◽  
Vol 64 (5) ◽  
pp. 563-566 ◽  
Author(s):  
A. I. Komkin ◽  
A. I. Bykov ◽  
M. A. Mironov
Keyword(s):  
Sound Pressure ◽  
Sound Pressure Levels ◽  
Acoustic Resistance ◽  
High Sound

Measurement of Acoustic Resistance at Sound‐Pressure Levels to 171 dB

1967 ◽  
Vol 41 (5) ◽  
pp. 1325-1327
Author(s):  
P. A. Marino ◽  
N. Bohn ◽  
G. D. Garrison
Keyword(s):  
Sound Pressure ◽  
Sound Pressure Levels ◽  
Acoustic Resistance

Design of silencer using resonator arrays with high sound pressure and grazing flow

2018 ◽  
Vol 138 ◽  
pp. 188-198 ◽  
Author(s):  
Sang-Hyeon Seo ◽  
Yang-Hann Kim ◽  
Kwang-Joon Kim
Keyword(s):  
Sound Pressure ◽  
Grazing Flow ◽  
Resonator Arrays ◽  
High Sound

scholarly journals Liner Impedance Eduction Under Shear Grazing Flow at a High Sound Pressure Level

AIAA Journal ◽  
2020 ◽  
Vol 58 (3) ◽  
pp. 1107-1117 ◽  
Author(s):  
V. Lafont ◽  
F. Méry ◽  
R. Roncen ◽  
F. Simon ◽  
E. Piot
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Pressure Level ◽  
Grazing Flow ◽  
High Sound

scholarly journals Liner Impedance Eduction under shear grazing flow for high sound pressure level

2019 ◽  
Author(s):  
Fabien Mery ◽  
Victor Lafont ◽  
Remi Roncen ◽  
Frank Simon ◽  
Estelle Piot
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Pressure Level ◽  
Grazing Flow ◽  
High Sound

Influence of sound pressure and grazing flow on the acoustic impedance of resonator orifice

2020 ◽  
Vol 2020.58 (0) ◽  
pp. 06a5
Author(s):  
Shotaro YAMAZAKI ◽  
Takayasu TORIGOE ◽  
Tomohito NAKAMORI ◽  
Masaharu NISHIMURA ◽  
Tonau NAKAI ◽  
...  
Keyword(s):  
Acoustic Impedance ◽  
Sound Pressure ◽  
Grazing Flow

Real Ear Sound Pressure Levels Developed by Three Portable Stereo System Earphones

1992 ◽  
Vol 1 (4) ◽  
pp. 52-55 ◽  
Author(s):  
Gail L. MacLean ◽  
Andrew Stuart ◽  
Robert Stenstrom
Keyword(s):  
High Frequency ◽  
Sound Pressure ◽  
Low Frequency ◽  
Test System ◽  
Output Frequency ◽  
Frequency Effects ◽  
Adult Men ◽  
Frequency Responses ◽  
Significant Difference ◽  
Sound Pressure Levels

Differences in real ear sound pressure levels (SPLs) with three portable stereo system (PSS) earphones (supraaural [Sony Model MDR-44], semiaural [Sony Model MDR-A15L], and insert [Sony Model MDR-E225]) were investigated. Twelve adult men served as subjects. Frequency response, high frequency average (HFA) output, peak output, peak output frequency, and overall RMS output for each PSS earphone were obtained with a probe tube microphone system (Fonix 6500 Hearing Aid Test System). Results indicated a significant difference in mean RMS outputs with nonsignificant differences in mean HFA outputs, peak outputs, and peak output frequencies among PSS earphones. Differences in mean overall RMS outputs were attributed to differences in low-frequency effects that were observed among the frequency responses of the three PSS earphones. It is suggested that one cannot assume equivalent real ear SPLs, with equivalent inputs, among different styles of PSS earphones.

Contributions of Voice and Nonverbal Communication to Perceived Masculinity–Femininity for Cisgender and Transgender Communicators

2020 ◽  
Vol 63 (4) ◽  
pp. 931-947
Author(s):  
Teresa L. D. Hardy ◽  
Carol A. Boliek ◽  
Daniel Aalto ◽  
Justin Lewicke ◽  
Kristopher Wells ◽  
...  
Keyword(s):  
Fundamental Frequency ◽  
Sound Pressure Level ◽  
Sound Pressure ◽  
Vocal Tract ◽  
Presentation Mode ◽  
Pressure Level ◽  
Presentation Modes ◽  
Audiovisual Stimuli ◽  
Vocal Tract Resonance ◽  
Point Light

Purpose The purpose of this study was twofold: (a) to identify a set of communication-based predictors (including both acoustic and gestural variables) of masculinity–femininity ratings and (b) to explore differences in ratings between audio and audiovisual presentation modes for transgender and cisgender communicators. Method The voices and gestures of a group of cisgender men and women ( n = 10 of each) and transgender women ( n = 20) communicators were recorded while they recounted the story of a cartoon using acoustic and motion capture recording systems. A total of 17 acoustic and gestural variables were measured from these recordings. A group of observers ( n = 20) rated each communicator's masculinity–femininity based on 30- to 45-s samples of the cartoon description presented in three modes: audio, visual, and audio visual. Visual and audiovisual stimuli contained point light displays standardized for size. Ratings were made using a direct magnitude estimation scale without modulus. Communication-based predictors of masculinity–femininity ratings were identified using multiple regression, and analysis of variance was used to determine the effect of presentation mode on perceptual ratings. Results Fundamental frequency, average vowel formant, and sound pressure level were identified as significant predictors of masculinity–femininity ratings for these communicators. Communicators were rated significantly more feminine in the audio than the audiovisual mode and unreliably in the visual-only mode. Conclusions Both study purposes were met. Results support continued emphasis on fundamental frequency and vocal tract resonance in voice and communication modification training with transgender individuals and provide evidence for the potential benefit of modifying sound pressure level, especially when a masculine presentation is desired.

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