UPDATE: The sounds from the forest behind our house have returned — bringing a recorder tonight

For those who followed my post from March: the infrasound events have started again. Last night at 1:40 AM the same deep rhythmic pulsing began — felt more in the chest than heard through the ears. Our dog refused to go outside. My partner, who was previously sceptical, came and stood next to me on the porch and didn't say a word for ten minutes. The frequency seems lower than before. I have borrowed a calibrated audio recorder from a friend who works in acoustic engineering and I am going out at midnight tonight to get a clean reading. Will post results tomorrow. If anyone in the rural Cascades area has experienced similar in the past week please comment below — I want to know if this is localised.