In new construction, what is the percentage of pay phones that must be equipped with volume controls?

4% is far below the ADA-mandated minimum and would not provide sufficient accessibility coverage for hearing-impaired users in new construction.

10% does not meet the ADA Standards for Accessible Design threshold of 25% for volume-control-equipped pay phones.

Under the ADA Standards for Accessible Design, Section 704.3, at least 25% of public pay phones provided in new construction must have receive volume controls that offer a minimum gain of 20 dB. This percentage establishes the federal minimum threshold ensuring meaningful accessibility for people with hearing loss across new facilities. No other percentage in the choices reflects the specific requirement codified in the ADA accessibility standards.

35% exceeds the required minimum but is not the percentage specified in the ADA accessibility standards for new construction.

50% is not the federally specified percentage and does not correspond to any requirement in the ADA Standards for Accessible Design.