The black smoke monster releases several distinct noises.
- The howling sound is usually in concert pitch A. The frequency of this pitch is 440 hertz. In music, "A-440" is the standard to which musical instruments are tuned.
- In the voice-over commentary for "The 23rd Psalm" on the Season 2 DVD, producer Bryan Burk confirmed that one of the Monster's sound effects is the receipt printer from a NYC taxi cab. You can hear the sound here.
- This may be why Rose says that she recognizes the sound, being from the Bronx.
- This was reaffirmed in the May 21, 2007 Official Lost Podcast, but it was clarified that the mythology of the Monster is unrelated to the cabs and was just a matter of sound effects. This sound effect was heard in the following scenes: