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Market & review 市场和评论
音响品牌 Sonos推出 「气候变化行动计划」,还发布了《2021 - 让聆听更美好》报告(link English),其中详细介绍了公司在 2021 年间的 ESG(环境、社会及治理)工作 - link
New products and features 新产品和功能
海信子品牌Vidda发布第二代音乐电视V5G - Link
Realme真我发布Buds Q2真无线耳机 - link
LG released new premium soundbar + satellite surround speakers - link. It acclaimed the world’s first center up-firing speaker soundbar.
Sonos now supports Amazon Music’s Ultra HD and Dolby Atmos tracks. - link
New OnePlus Buds Z2 boast Dolby Atmos? - Link. That’s a bit strange! What does it mean? Check their website: it says Dolby Atmos is only supported on some OnePlus mobile phones.(link) A closer look shows that there is an earphone sound enhancement feature which is adapted to particular headphone models. (link)
Audio technology 音频技术
Apple prepared three demos to show the sound difference of stereo, stereo spatialisation (stereo content + binaural rendering with head-tracking) and multichannel (multichannel content + binaural rendering with head-tracking). You need to have apple devices when playing the demo, otherwise, it could not work properly. - link
拆解报告:Beats Fit Pro真无线降噪耳机,使用苹果H1芯片 - link
Arioso systems have a new prototype of their MEMS speaker - link. Below are my thoughts.
The electrostatic principle & very high acoustic output impedance (since look from front, acoustically just a steel wall, no membrane and internal volume), make it work like a volume displacement source. When it is tested on ear or artificial ear, its response is the transfer impedance of ear simulator times frequency, i.e. the response showed in ear simulator data sheet. Check the fig4d in this paper. Its SPL level increased when front volume is reduced. However, this type of response is not balanced frequency response for earphones yet, and it’s very sensitive to any variation of acoustic impedance coupled at its front (for example, leakage, volume changes with depth). Such high impedance transducer might first land in hearing aid applications.