简单描述:氣垫鼻祖ACOUSTIC RESEARCH AR1 1954年联系人:古先生 13703007821 微信号:ys3393696联系地址:珠海市香洲区梅华东路212-3地铺悦声经典音响(建设银行旁) 看了又看 德国古董机王有声电影Klangfilm KLV402功放已售出谢谢关注! SIEMENS西门子SF.V.6.6电影功放一对已售出谢谢关注! 英国LINN IKEMI奇美CD机成色如新原...
The research on acoustic metamaterials that can offer high sound absorption and sound proofing characteristics are increasingly being documented. As such, the review has identified a range of acoustic metamaterial architectures that can be adopted to enhance sound insulation in buildings. These metamaterial...
Understanding the physical acoustic properties, like effective particle velocity, can help to validate an accurate electrical-thermal-acoustical model of these speakers which is an important challenge for future design improvements. Because the CNT thin-film is very fragile and does not move, measuring...
For the experiment shown in Fig.4, the CW and CCW waves are generated in a circular waveguide of radius 1.7 cm, into which three balanced armature speakers are inserted. The signal amplitudes in the three speakers are kept the same, and the phases are controlled by two waveform generator...
A comparison of pitch variation in native and non-native productions of French and German speakers. In N. Campbell, D. Gibbon, & D. Hirst (Eds.), Proceedings to the 7th Speech Prosody Conference (pp. 1037–1041). Dublin, Ireland: International Speech Communication Association. Download ...
Research from the literature is presented in acoustic parameters that were measured with the use of alternative acoustic sources. Emphasis is given where comparisons have been made with dodecahedron speakers. Finally, ISO 3382-1 source requirements as stated in the introduction involve omnidirectionality...
Review of recent development of MEMS speakers. Micromachines 2021, 12, 1257. [CrossRef] [PubMed] 43. Tumpold, D.; Stark, M.; Euler-Rolle, N.; Kaltenbacher, M.; Jakubek, S. Linearizing an electrostatically driven MEMS speaker by applying pre-distortion. Sens. Actuators A Phys. 2015, ...
(ER-2 loudspeaker, Etymotic Research Inc., Elk Grove Village, IL, USA), the substrate was installed on a sample carrier with a pressure port underneath each sample. An airtight coupling between the sample and the carrier was achieved using a rubber X-ring seal underneath each sample and the...
So far, these have only been used for acoustic noise filters, but we believe that advanced research in the future can incorporate smart materials into such systems to harvest energy from the structures simultaneously. Funding This research received no external funding. Institutional Review Board ...