Home sleep apnea test (HSAT)
A simple sleep test done at home, in your own bed, with a few sensors. It does not measure brain waves; it follows breathing and oxygen.
A little more detail
An unattended recording that includes at least airflow, respiratory effort and oximetry. The AASM 2017 guideline recommends polysomnography or a technically adequate HSAT in uncomplicated adults with a high likelihood of moderate to severe sleep apnea; if the HSAT is negative or inadequate, polysomnography should be done.
Source: Kapur VK, Auckley DH, Chowdhuri S et al. Clinical practice guideline for diagnostic testing for adult obstructive sleep apnea: an American Academy of Sleep Medicine clinical practice guideline. J Clin Sleep Med. 2017;13(3):479-504. doi:10.5664/jcsm.6506