Results 71 to 80 of about 1,334 (158)

Research on Acoustic Energy Power Generation System Based on Dual Cavity Structure Helmholtz Resonator and Modified Piezoelectric Ceramics. [PDF]

ACS Omega
Wang X, Zhang S, Shen G.
europepmc   +1 more source

Cavity-Enhanced Raman and Helmholtz Resonator Photoacoustic Spectroscopy to Monitor the Mixed Sugar Metabolism of E. coli. [PDF]

Anal Chem, 2019
Metcalfe GD, Alahmari S, Smith TW, Hippler M.   +3 more
europepmc   +1 more source

Study on Acoustic Metamaterial Unit Cells: Acoustic Absorption Characteristics of Novel Tortuously Perforated Helmholtz Resonator with Consideration of Elongated Acoustic Propagation Paths. [PDF]

Materials (Basel)
Huang Y, Fan Q, Wang X, Liu Z, Shi Y, Liu C.   +5 more
europepmc   +1 more source

Reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator. [PDF]

Sci Rep, 2018
Long H, Cheng Y, Liu X.
europepmc   +1 more source

A high-intensity low-frequency acoustic generator based on the Helmholtz resonator and airflow modulator. [PDF]

PLoS One
Zhang B, Dong M, He B, Fang H, Ruan H, Zhang M, Liang X, Zhang F, Sun D.   +8 more
europepmc   +1 more source

Photoacoustic trace gas detection of OCS using a 2.45 mL Helmholtz resonator and a 4823.3 nm ICL light source. [PDF]

Photoacoustics
Gao Z, Li L, Liu M, Tian S, Feng M, Qiao Y, Shan C.   +6 more
europepmc   +1 more source

Noise Attenuation Performance of a Helmholtz Resonator Array Consist of Several Periodic Parts. [PDF]

Sensors (Basel), 2017
Wu D, Zhang N, Mak CM, Cai C.
europepmc   +1 more source

Diode laser photoacoustic spectroscopy of CO₂, H₂S and O₂ in a differential Helmholtz resonator for trace gas analysis in the biosciences and petrochemistry. [PDF]

Anal Bioanal Chem, 2019
Alahmari S, Kang XW, Hippler M.
europepmc   +1 more source

Helmholtz resonators with added porous absorbers

, 1994
International audience ; Helmholtz resonators often are combined with porous materials in order to increase the bandwidth of their resonances. A previous article [1] has treated perforated metal sheet covers on porous absorber layers. The results from this can be applied for normal sound incidence directly to Helmholtz resonators in which absorber ...
openaire   +1 more source

Design and Validation of a PU-Six-Cavity Helmholtz Metamaterial Composite Acoustic Package for Broadband Noise Reduction in Commercial Vehicle Cabs. [PDF]

Materials (Basel)
Cai C, Duan Y, Wang T, Wang A, Wang X, Shi Y, Xiao X, Huang Y.   +7 more
europepmc   +1 more source