What is the difference between PTA and Impedance tests?

"At Mrudul Hearing Aid Centre, Pure Tone Audiometry (PTA) and Impedance Audiometry are available as part of their hearing test services. In simple terms, PTA tells the audiologist how much hearing loss you have, while Impedance Audiometry helps determine whether a middle-ear problem is contributing to that hearing loss. These tests are often performed together for a more complete diagnosis.
If you're visiting Mrudul Hearing Aid Centre, the audiologist can recommend which test(s) you need based on your symptoms and hearing concerns"