Zip DS Sounds Table of Contents Single bark at 1000 Hz2 seconds of ambient sound (extinction trial–no treat)2 seconds of ambient sound with birds (extinction trial–no treat)Bark pattern at 1000 Hz (the same one as before) Single bark at 1000 Hz (There is only one second lead time, so be ready!) http://soundsensitivedogs.com/wp-content/uploads/2018/10/single-bark-trimmed-noise-removed-1000.wav 2 seconds of ambient sound (extinction trial–no treat) http://soundsensitivedogs.com/wp-content/uploads/2018/10/2-seconds-ambient.wav 2 seconds of ambient sound with birds (extinction trial–no treat) http://soundsensitivedogs.com/wp-content/uploads/2018/10/2-second-ambien-with-birds.wav Bark pattern at 1000 Hz (the same one as before) http://soundsensitivedogs.com/wp-content/uploads/2018/10/loudest-dog-trimmed-noise-removed-1000.wav