2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)
Where counters or teller windows have security glazing to separate personnel from the public, a method to facilitate voice communication shall be provided. Telephone handset devices, if provided, shall comply with Section 11B-704.3.
Advisory 904.6 Security glazing. Assistive listening devices complying with Section 11B-706 can facilitate voice communication at counters or teller windows where there is security glazing which promotes distortion in audible information. Where assistive listening devices are installed, place signs complying with Section 11B-703.7.2.4 to identify those facilities which are so equipped. Other voice communication methods include, but are not limited to, grilles, slats, talk-through baffles, intercoms, or telephone handset devices. ◼
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