Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Alan S. Hersh"'
Publikováno v:
18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c0133a286a6fbb16320c7d7bac10c21
https://doi.org/10.2514/6.2012-2295
https://doi.org/10.2514/6.2012-2295
Autor:
Alan S. Hersh, Bruce E. Walker
Publikováno v:
10th AIAA/CEAS Aeroacoustics Conference.
For the past approximately 30 years, measurements of acoustic impedance of resonant sound absorbers in grazing flow environments have been conducted using Dean’s two microphone method. In summary, the method employs one microphone in the “inciden
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::169957d6661eb3971e2ce333e0e34889
https://doi.org/10.2514/6.2004-2839
https://doi.org/10.2514/6.2004-2839
Publikováno v:
8th AIAA/CEAS Aeroacoustics Conference & Exhibit.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6bc0d0ed6a26d7f7df3640747fc334c
https://doi.org/10.2514/6.2002-2443
https://doi.org/10.2514/6.2002-2443
Publikováno v:
The Journal of the Acoustical Society of America. 114:2339-2339
Active control of turbofan rotor/stator interaction tones is complicated by the simultaneous presence of multiple duct propagation modes. In‐duct error sensing microphone arrays that can adequately resolve these modes typically require duct lengths
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be2d5ea24b13104082c008a39d7078e5
https://doi.org/10.1121/1.4781088
https://doi.org/10.1121/1.4781088
Publikováno v:
The Journal of the Acoustical Society of America. 111:2452
Blade passage harmonic tones are a significant component of turbofan engine noise under approach conditions. Active noise control (ANC) offers a tool for suppression of these tones, with the caveat that interference patterns in the sound field can le
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee7550f80cc93f3d48f56e5d25ada860
https://doi.org/10.1121/1.4778450
https://doi.org/10.1121/1.4778450
Publikováno v:
The Journal of the Acoustical Society of America. 108:2500-2500
Gas turbine generators radiate noise from their exhaust stacks that contains substantial acoustical energy at very low frequencies. This kind of noise can result in community annoyance due to window rattling and other structural vibration excitation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e99357185ff14a3295993d8c6f6f1b62
https://doi.org/10.1121/1.4743231
https://doi.org/10.1121/1.4743231
Publikováno v:
The Journal of the Acoustical Society of America. 105:1351-1351
Rotor/stator‐generated aerodynamic noise in turbofan engines, HVAC axial fans, and other turbomachinery is often dominated by blade passage harmonics produced by dipole sound sources. Radiation toward the inlet and exhaust depends upon the effectiv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31c8a447f50bdb993dbbd117afb7ced8
https://doi.org/10.1121/1.426406
https://doi.org/10.1121/1.426406
Autor:
Alan S. Hersh
Publikováno v:
The Journal of the Acoustical Society of America. 98:1831-1831
A sound generator that has a plurality of acoustic piezoelectric transducers coupled to a single Helmholtz resonator. The resonant frequency of the Helmholtz resonator and each transducer can be intentionally chosen to be different so as to be stagge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ddb0336a67824b2960134d1bf8e8519
https://doi.org/10.1121/1.413394
https://doi.org/10.1121/1.413394
Autor:
Alan S. Hersh, Jin Tso
Publikováno v:
The Journal of the Acoustical Society of America. 93:2256-2256
Extended frequency range Helmholtz resonators particularly useful for sound absorption over a relatively wide frequency range are disclosed. The resonators (24) are conventional Helmholtz resonators with the addition of an active acoustic driver (34)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::465fcb06d4902a7f0a4c21089a799bac
https://doi.org/10.1121/1.406645
https://doi.org/10.1121/1.406645
Autor:
Alan S. Hersh
Publikováno v:
Journal of the Construction Division. 100:433-448
Construction noise as a source of community noise pollution is reviewed. The review, divided into five parts, is written so that an engineer not familiar with acoustics can be aware of the environmental effect of the large number of construction proj
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3f85edfd849e12a8e20d8e643d27071
https://doi.org/10.1061/jcceaz.0000446
https://doi.org/10.1061/jcceaz.0000446