Door Knock

1 Helicopter
2 Spaceship
3 Steam Train
4 Bells
5 Shotgun
6 Thunderstorm
7 Factory Hooter
8 Diesel Train
9 Sports Car
10 Sea
11 Siren 1
12 Water Filling and Draining
13 Door Opening Key Locking
14 Dish Breaking
15 Door Knock
16 Alarm Clock
17 Pendulum Clock
18 Machine Tool for Wood
19 Glass Window Breaking
20 Camera With Motors
21 Typewriter
22 Telegraph
23 Sawmill
24 Guiro's
25 Hairdryer
26 Racing Cars 2
27 Emptying of a Wash Basin
28 Cuckoo Clock
29 Spacecraft 2
30 Spacecraft 1
31 Alarm Bells
32 Bicycle Bell
33 Door - Bell
34 Military Trumpet
35 Digging With Spade
36 Empty Trash Can Being Kicked
37 Coyote
38 Lion
39 Tiger
40 Pigeons
41 Motorcycle
42 Boeing 707 Jet
43 Small Monoplane
44 Wagon Loading and Unloading Gravel
45 Underground Station
46 Storm With Thunderbolts
47 Blast of Wind
48 Avalanche
49 Waves
50 Tree Falling
51 Waterfall
52 Nightingales
53 Thrush
54 Skylark
55 Cuckoo
56 Lazer Shots
57 Cows
58 Pigs
59 Crow
60 Crickets
61 Frogs
62 Bumblebees
63 Dogs Growling
64 Racing Cars 1
65 Street Traffic
66 Giant Roller Coaster
67 Merry-Go-Round
68 Orchestra Warming Up
69 Submarine Sonar - Atari Tennis
70 Footsteps On Gravel
71 Footsteps Circling
72 Crowd
73 Man Laughing
74 Man Yawning
75 Man Snoring
76 Heartbeat
77 Applause
78 Assorted Birds In Garden
79 Chicks
80 Siren 2