noun
blanket area
A term used in broadcasting or telecommunications to refer to a coverage area where a signal is uniformly available, like a blanket covering a region.
この地域はラジオのブランケットエリアです。
This area is within the radio blanket area.
Variant with interpunct; less common but seen in some contexts.
Loanword from English 'blanket area', referring to a region with uniform signal coverage.