acoustical barrier

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sound barrier

Any solid obstacle which is relatively opaque to sound that blocks the line of sight between a sound source and the point of reception of the sound.
References in periodicals archive ?
WindStop technology is an innovation that surrounds the microphone with an acoustical barrier to filter the disruptive effects of wind noise, enabling clear conversations in adverse conditions.
Acoustical barriers in classrooms: the impact of noise on performance in the classroom.
Classroom Acoustics II: Acoustical Barriers to Learning features information about the problems experienced by teachers and students as a result of noise and reverberation in the classroom and includes more than 150 additional references on the topic.