Pool Hum

Lately I’ve been working on a series of underwater and hydrophone based recordings for a sound library.  One of my first stops was my brother-in-law’s pool for some scuba sounds.

He’s a trained diver and he was nice enough to let me come out for the day and put him through his paces.  Unfortunately, we couldn’t get started until late in the day because of this sound:

I consider it a happy accident.  Initially I was really frustrated because I couldn’t figure out where this low frequency sound was coming from and I needed to record scuba sounds!  I kept looking around and there definitely wasn’t a nuclear sub in the pool!  My brother-in-law and I quickly discovered that a neighbor down the block was having his driveway ripped up and repaved.  All of that low frequency information was traveling from down the street and under the pool.  So what do you do when you have a loud hum?  We went out for lunch and then I took my nephew and niece out for ice-cream.  By the time we returned to the pool we were free and clear of construction hums and we could make all of the bubbling sounds we wanted.

Recording Geek Note: Rig consists of 2 Aquarian H2a Hydrophones. It was all tracked to a Sound Devices 744T at 24/96