That note should be B flat, not B.

那个音应该是降B音，而不是B音。

《牛津词典》

One of the suites, for example, exhibits the musical refrain B-flat, a, c, b, which in German usage spells Bach.

比如组曲中其中一个曲子有一个“降b, A, C, B”的反复，而这四个字母排列恰巧是“巴赫”的德语拼法。

youdao

Three-part Invention in B flat Dorian, Op. 3, No. 5.

三声部降B多利亚调式创意曲，作品第3号，第5首。

youdao

This is his Symphony No.5 in B-flat so let's listen to this.

我们要听的来自他的降B大调第五交响曲。

耶鲁公开课 - 聆听音乐课程节选

The typical pitch of a vuvuzela is said to be B flat below middle C.

BBC: 10 things about the vuvuzela

"If we are - if we are able to do that - it will be a Kerfuffle in B Flat for wasps and soprano, " he said.

BBC: Brighton festival to celebrate children with line-up

Mozart twiddled his thumbs in Munich by writing the Piano Sonata in B-flat, K. 281.

NPR: Mozart's Job Hunting Dilemma