The larger the wave size is compared to the physical aperture of the microphone the less efficient the surface is at converting the pressure wave into whatever

The larger the wave size is compared to the physical aperture of the microphone the less efficient the surface is at converting the pressure wave into whatever (up to about 1/4 wavelength where things get weird). Electronics can make up for a lot of this to even things out but there are physical limits. It's reciprocal is more well known. To generate long wavelength sound efficiently you need large speaker apertures. In the same way you can't really use a 2cm speaker to generate bass you can't use a 2mm microphone to sample a 5 Hz (70 meter) pressure wave in the air.