You can buy non-microphonic cables for pretty cheap. Bought a 7€ hama cable for an old pair of Philips 2xhr headphones and it was completely silent.
IEM/earbud cables are a little trickier, but there are plenty of sub 20€ cables online that are good. Microphonics is only really a problem with carelessly designed or very cheaply made cables.
You can buy non-microphonic cables for pretty cheap. Bought a 7€ hama cable for an old pair of Philips 2xhr headphones and it was completely silent.
IEM/earbud cables are a little trickier, but there are plenty of sub 20€ cables online that are good. Microphonics is only really a problem with carelessly designed or very cheaply made cables.