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content/.smart-env/multi/Alan_Blumelein_md.ajson
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"smart_sources:Alan Blumelein.md": {"path":"Alan Blumelein.md","last_embed":{"hash":null},"embeddings":{},"last_read":{"hash":"1uql4l7","at":1760980127229},"class_name":"SmartSource","last_import":{"mtime":1760979974216,"size":39,"at":1760980127229,"hash":"1uql4l7"},"blocks":{"#---frontmatter---":[1,3],"#person":[4,5]},"outlinks":[],"metadata":{"date":"2025-10-20 13:06","tags":["#person"]},"task_lines":[]},
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content/.smart-env/multi/Bell_Laboratory_md.ajson
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"smart_sources:Bell Laboratory.md": {"path":"Bell Laboratory.md","last_embed":{"hash":null},"embeddings":{},"last_read":{"hash":"ax7kec","at":1760980127228},"class_name":"SmartSource","last_import":{"mtime":1760979963526,"size":37,"at":1760980127228,"hash":"ax7kec"},"blocks":{"#---frontmatter---":[1,3],"#stub":[4,5]},"outlinks":[],"metadata":{"date":"2025-10-20 13:06","tags":["#stub"]},"task_lines":[]},
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content/.smart-env/multi/Blumlein_md.ajson
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content/Alan Blumelein.md
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content/Alan Blumelein.md
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date: 2025-10-20 13:06
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---
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#person
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content/Bell Laboratory.md
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content/Bell Laboratory.md
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date: 2025-10-20 13:06
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#stub
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content/Blumlein.md
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date: 2025-10-20 13:05
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最も初期のステレオ録音方式で、発明者である[[Bell Laboratory]]の[[Alan Blumelein]]が名前の由来。
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双指向性のマイクロフォンを水平方向同じ位置、角度を90度の互い違いに配置して録音する。
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同じポイントで全指向性のマイクロフォンを追加するとダブルMS録音をやっていることに等しくなり、前後左右四方向の任意の指向性を後からレンダリングできる。
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さらに垂直方向の双指向性マイクを加えれば、1次のアンビソニックBフォーマットを録音していることになる。
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@@ -3,19 +3,19 @@ date: 2025-10-20 12:42
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#research
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## ベル研究所のクリッピング
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## [[Bell Laboratory|ベル研究所]]のクリッピング
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中身がなんだかわからないのでとりあえず予約したやつ。
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### Early Hi-Fi and Stereo Recording at Bell Laboratories(1931-1932)
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A.C. Keller, Journal of Audio Engineering Society Vol.29, No ,4 1981 April 274p
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[[Arther C. Keller]], Journal of Audio Engineering Society Vol.29, No ,4 1981 April 274p
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あった。無料で読めるね
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[E-library page - AES](https://aes2.org/publications/elibrary-page/?id=18963)
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### The Bell Labs Story Part 1 - Barry Fox examines the historic experimental work on sound and reproduction performed in the '30s.
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### The Bell Labs Story Part 1 - [[Barry Fox]] examines the historic experimental work on sound and reproduction performed in the '30s.
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HI-FI NEWS & RECORD REVIEW vol 27-no.2, 1982, February p21
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@@ -23,4 +23,10 @@ HI-FI NEWS & RECORD REVIEW vol 27-no.2, 1982, February p21
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HI-FI NEWS & RECORD REVIEW 1982 March p53
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これはなさそう。
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## The Bell Labs Story Part 3 - Barry Fox concludes the story
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HI-FI NEWS & RECORD REVIEW 1982 April p21
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これはなさそう。
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[[Arther C. Keller]]という人が1981にAESの記事でベル研の30年代のステレオやハイファイレコーディングの仕組みを振り返っていて、ステレオ録音50年記念ということでBarry Foxという人がそれを追っかけているっぽい。Kellerは[[Blumlein]]録音の[[Alan Blumelein]]の同僚。
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