Are these headphones approved?

[3dward]

Sony Studio Monitor Series Headphones - MDR-V150

Frequency Response 18Hz - 22kHz
Sensitivity/SPL 98dB/mW
Impedance 24 ohms

Price (Best buy) - $19.99

Sennheiser Open-Air Wireless Stereo RF Headphones - RS130

Frequency Response 18Hz - 21kHz
Sensitivity/SPL 68dB/mW
Impedance Not Applicable

Price (Best buy) - $149.99

I was wondering if these headphones would be comparable to the Sennheiser headphones, they have a larger frequency range, they also have a higher sensitivity, aka signal to noise, from what I understand the higher the ratio, the less obtrusive. But then again they have 24 ohms of impedance, which I don't think interferes with quality.