How Much is the Noise Level be Reduced? – Speech Recognition Threshold in Noise Environments Using a Parametric Speaker –

As a technology that allows sound to be heard only in specific areas in public spaces, the directional sound of parametric speakers has been attracting attention. The parametric speaker is also expected to have a wide range of uses, in settings ranging from shopping malls to museums for presenting information sound. The purpose of this study is to measure evaluate the Speech Recognition Threshold (SRT) of parametric speakers and compare with that of loudspeakers at various noise levels through experiments. It can also reveal how much the parametric speaker can reduce the noise heard by non-target users, which is unavoidable with loudspeakers.