anechoic chamberanechoic enclosuresanechoic roomdead roomfree field roomfree-field room消声: noise elimination; damping; ...室: room消声室,无回声室: anechoic chamber半消声室: hemi-anechoic chamber; semi-anechoic room降噪消声室: lined air chamber for noise reduction下载手机词典可随时随地查词查翻译