diff --git a/simgear/sound/jet_ima4.wav b/simgear/sound/jet_ima4.wav
new file mode 100644
index 00000000..5b223e53
Binary files /dev/null and b/simgear/sound/jet_ima4.wav differ
diff --git a/simgear/sound/jet_ulaw.wav b/simgear/sound/jet_ulaw.wav
new file mode 100644
index 00000000..1715bc24
Binary files /dev/null and b/simgear/sound/jet_ulaw.wav differ