摘要：This paper presents quiet zone design using ultrasonic transducers for local active control in pure tone diffuse fields. Most of researches in local active noise control used conventional loudspeakers for the secondary sources to produce quiet zones. Recently ultrasonic transducers have been used for the secondary sources to control the plane wave in active noise control. However there is no research related to active noise control in diffuse fields using ultrasonic transducers. Therefore this study uses ultrasonic transducers for the secondary sources to control the diffuse fields. The quiet zone produced using ultrasonic transducers in single tone diffuse fields has been analyzed through simulations in this work. The results showed that quiet zones created using ultrasonic transducers were larger than those created using conventional loudspeakers. This is due to the fact that the audible sound pressure produced by the ultrasonic transducers decays slowly with the distance. Therefore the secondary field created by an ultrasonic transducer could fit the primary field better and the larger zone of quiet could be obtained using the ultrasonic transducer. Also the audible sound produced by the ultrasonic transducers is directional;therefore the sound pressure amplification outside the quiet zones was lower.

摘要：The bleed slot is necessary for the requirement of the hypersonic quiet flow all over the world. The aim of the bleed slot is to decrease the influence of the disturbances from the contraction of the quiet nozzle to the boundary layer downstream of the throat, so that the boundary layer of the nozzle could be maintained as laminar flow. The main parameters of the bleed slot include the distance from lip to throat (DLT) and the width of slot (WS). Various values of those parameters will affect the performance of the slot by changing the suction intensity of the bleed slot. Two kinds of the bleed slots in the world are compared in this paper and the aerodynamic design of the bleed slots is optimized based on the Purdue-type slot. The influences of the various values of those parameters to the flow field around the throat are analyzed and the optimizing results of DLT and WS are consistent with those relative data designed for the slot of the Boeing/AFOSR Ma 6 quiet Tunnel.

摘要：quietComfort25采用折叠收纳的方式让收纳盒小了一大圈，这样的设计让携带变的更为方便，收纳盒内的专属备用电池和航空适配器收纳位，让用户无需担心电池续航和航空适配器无处存放的问题，最重要的是QC25拥有无源情况下依然可以聆听的重大变革，这使得Bose quietComfort系列消噪耳机全面具备了无源播放功能，让QC25的使用范围变得更为广泛。

摘要：据国外媒体报道,加拿大电脑外设制造商Matias公司近日发布了一款号称是＂世界上最安静的机械键盘＂,名为quiet Pro。Matias公司宣称虽然quiet Pro＂很安静＂,但是手感触觉方面没有任何牺牲。此外,该公司还表示,这款键盘一共花费了两年时间来进行设计。据了解,这款键盘和其他键盘一样支持PC和Mac,一共有两个版本,一种是全黑版,另外一种是银配黑版本。它拥有3个USB2.0接口,激光蚀刻的按键。售价为150美元左右。

摘要：quietComfort2降噪耳机的升级版。新的电子消噪技术能在宽广的频率范围内，或嘈杂的环境下去除嗓音。特制的耳罩．能进一步起到物理消噪作用。专利的TriPort声学结构设计。令外形小巧的它得以营造出浑厚低频。动态EQ还能自动控制频响，将音乐与耳机特性的配合调至最佳状态。

摘要：2014年,运行了数十年的加拿大国际广播电台（RCI）短波发射台（位于新布伦瑞克省）被拆除；2017年、艺术家阿曼达·道恩·克里斯蒂（Amanda Dawn Christie）为了纪念该发射台进行了一次表演。这场名为《无线电安魂曲：寂静的震颤》（Reciuiem for Radio：Full quiet FIutfer）的三人表演使用了装配有电容式传感器的无线电天线杆。

摘要：我最早接触Bose的产品便是QC系列,当时的广告宣传片还历历在目——一位西装笔挺的商务人士在机舱之中戴着QC系列耳机,当时产品的宣传点便是降噪。在我从事媒体的十多年来以,Bose一直都是消噪耳机的领军人物。

摘要：旅居加拿大的十几年间,我生活在如画风景中,却不自知。一次偶然的机会,我接触到摄影这门艺术,它仿佛为我打开了一扇窗,让我看到了曾经忽视的美丽。学习摄影的过程,也是寻找美、发现美、呈现美的过程。我乐在其中,并享受它带给我的点滴美好。我很幸运,能用摄影来点缀生活、丰富人生,而不枉度时光。

摘要：Bose可说是耳机降噪技术的先行者，quiet Comfort系列耳机则是其最经典的产品系列。作为该系列最新的产品，QC25延续了上一代产品的全包式设计，虽然它不属于那种一眼就让人爱上的“亮骚货”，但由于耳置部分采用了阳极氧化磨砂铝材质，加上Logo经过拉丝处理，质感相比QC15还是要好很多。在配色方面Bose有进步，不再只有黑灰的“商务配色”，我收到的这放白色版就显得时尚不少。

摘要：2009年10月16日,世界知名音响公司Bose在上海波特曼丽嘉酒店举办了盛大的2009新品发布会,推出了三教Bose耳机,分别是：Bose系列产品中消噪效果最好的quiet Comfort15有源消噪耳机,专为多功能音乐手机设计的Bose in-ear耳塞式耳机移动通话套装和Bose on-ear贴耳式耳机移动通话套装。