English example sentences with "directional"

Each arm of the eyeglass frame has an array of four tiny directional microphones.
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In March, Busan launched a mobility service called Dagachi Naranhi, or Side By Side, that uses GPS technology to provide localized directional information inside one of its metro stations via a smartphone app.
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Puppeteers control the huge beasts from backstage, sending directional instructions by remote control.
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