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Acoustic performance of eleven commercial phone booths according to ISO 23351-1
Turun ammattikorkeakoulun tutkimuksia : 51 (Turun ammattikorkeakoulu, 2021)The purpose of this study is to determine the speech level reduction DS,A for 11 typical phone booths and analyze how the results fall to the classes A+, A, B, C, and D defined in ISO 23351-1.
