noun, masculine/i.ʒja.fɔn/plural: hygiaphones
grill, transparent, perforated two-way communication device - at a ticket counter etc.
“There are four clear-glass hygiaphone booking windows in the ticket office, framed in anodised aluminium.”
From hygiène + -phone. From ὑγιής (hugiḗs, “healthy”) + φωνή (phōnḗ, “speech”).