(a) Recording of the dummy head’s right ear in a wind tunnel with an air flow orthogonal to the on-ear axis, with (black line) and without (grey line) windshields. The dotted line is a reference measurement with the wind tunnel turned off. (b) Same as (a), but with wind flow on the ear-axis. (c) Difference between transfer functions of the left ear in an anechoic chamber with and without the windshields. (d) Same as (c), but for the right ear.