Every 30 seconds I hear a two-tone sound coming from the engine compartment

What is your question?

It seems to come from the front passenger side of the compartment. The sound is louder when heard from inside the car than it is when looking into the open engine compartment. There are NO indicator lights lighted on my dashboard. I have 52000+ miles on the car. I bought the car new, and average 40 mpg. I have the oil changed every 5000 mi (give or take). I have all the recommended services done at the dealership when they recommend something to me. I have no leaks coming from my car.

What makes this problem better or worse?

Hot, cold; wet,dry - no difference

How long has your 2016 Hyundai Accent had this problem?

Today 4Feb19