When a pitch is lower what is happening to the frequency?

As the frequency decreases, you hear a lower pitch

Explanation:

The lower the frequency, the lower the pitch.

The frequency of sound waves, in turn, determines the pitch of the sound. Sound waves with a higher frequency produce sound with a higher pitch, and sound waves with a lower frequency produce sound with a lower pitch.

Explanation:

I googled it

satin. 

"very shiny satin may look great in the fabric store or in the sewing room, but once onstage it can look fake and cheap as it reflects the light from the fixtures."