They're not the same things, no, but they obey the same wave mechanics, and due to the difference in propagation velocity, their wavelengths are actually very close. A wavelength of 3 meters is about 100 MHz in the RF world, and 1 kHz in audio terms.
That's why an RF anechoic chamber looks a lot like an acoustical anechoic chamber, and often sounds like one too.
That's why an RF anechoic chamber looks a lot like an acoustical anechoic chamber, and often sounds like one too.