Influence of weak background sound on sound signal perception

1、

Development and application of real-time analysis system on cockpit voice background sound in airplane

飞机舱音背景声特征实时分析系统开发及应用

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2、

The background sound of an environment in relation to which all foreground sounds are heard, such as the'silence'of an empty room, conversation in a restaurant, or the stillness of a forest.

环境的背景声音指的是所有可听到的突出声音，比如空房间里的“静默之声”，餐馆里的谈话，或者森林里的沉寂。

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3、

The disruption by background sound is imposed at both encoding and rehearsal periods.

背景声音干扰处于编码阶段和复述阶段。

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4、

Preventive management of veinous backflow obstruction of infrahyoid myocutaneous flap

舌骨下肌皮瓣静脉回流障碍的预防性处理

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5、

Junction Treatment in Computation of Short Backfire Antenna by Moment Method

短背射天线矩量法计算中的结头处理

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6、

The backfire antenna is a kind of compact structure, high gain and lower sidelobe antenna, but its bandwidth is limited.

背射式天线具有增益高、副瓣低和结构紧凑的特点，但其频带较窄。

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7、

The final result shows that the stress peak value of the tunnel is reduced by 95% with the foamed concrete backfill layers, and dynamic parameter such as acceleration and displacement is attenuated to a certain extent.

计算结果表明，增加泡沫混凝土耗能层后，坑道结构的应力峰值衰减了95%以上，加速度和位移等运动参数也有不同程度的降低。

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8、

The dynamic response of tunnels can largely be reduced by the foamed concrete backfill layers, which can be used to construct a sort of ideal energy absorption support structure.

泡沫混凝土耗能层能够明显减小结构的动力响应，可以用来构筑较理想的结构消波吸能型式。

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9、

Comparing with conventional concrete backfill technology, the new one of concrete backfill using for embedded pre Pressure steel Pipes has some advantages such as shorter construction period, lower cost.

埋藏式预压力钢管混凝土回填新技术与常规回填相比，简化了施工措施，缩短了工期，具有良好的技术经济效益。

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10、

A Kind of New Technology of Concrete Backfill Using for Embedded Pre-pressure Steel Pipe in Xiangshui Hydropower Station

响水电站埋藏式预压力钢管混凝土回填新技术

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11、

An Experimental Study on Strength Properities of Concrete Backfill

混凝土充填体强度特性试验研究

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12、

Key construction technique mainly includes maintaining cavern stability, protecting surrounding rock integrity and guaranteeing concrete backfill quality.

关键施工技术主要体现于维护施工期洞室稳定，保护围岩完整性和保证结构混凝土回填质量三方面。

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13、

The Backfill Grouting for the Underground Culvert at West Ring Road of the South-North Water Transfer Project

南水北调西四环暗涵工程回填灌浆施工

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14、

Forced Defrosting and Backfill Grouting Composite Application at φ 14.87 Shield Launching Section Frozen Area

φ14.87盾构出洞段冻结区强制解冻及注浆充填的复合应用

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15、

Construction of Backfill Grouting and Consolidation Grouting In Tunnel Excavated by TBM

TBM掘进隧洞回填固结灌浆施工的探讨

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16、

Pea Gravel Backfill Grouting and Its Quality Control in the Construction of TBM

浅谈TBM施工中豆砾石回填灌浆及其质量控制

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17、

Application of Backfill Grouting in Road Construction

回填注浆在道路施工中的应用

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18、

This paper introduces the application of the backfill grouting technique to block up the branch tunnel, the corresponding technology, technique request and result evaluation are given.

文章介绍了回填灌浆技术在支洞封堵中的应用，支洞回填灌浆的施工工艺、技术要求以及效果评价。

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19、

Application of Backfill Grouting In Earth Section of No.3 Tunnel of the South Main Line

回填灌浆技术在南干3~洞土洞段中的应用

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20、

By the means of a hydraulic displacement control mechanism made by the authors, centrifuge model tests on lateral pressure of wails retaining compacted clayey backfill, which displacement can be controlled, have been conducted.

笔者利用自制的一套位移控制液压装置做了11组位移可控式压实粘性填土档土墙土压力的离心模型试验。

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