00:04with all this screaming and grunting and barking you could be forgiven for thinking that all chimps
00:10sound the same but you couldn't be further from the truth these are panties they're a call sign
00:19distinctive to each individual chimp and in alpha males it's all about making as much noise as
00:27possible high-ranking individuals are a bit louder um it may well be that it's just simply because
00:37they are more confident they're more assertive but also maybe is that they are sort of demonstrating
00:44their communication skills tone is another really important factor no deep sounds are associated with
00:55big body size so if you're trying to threaten um another individual drop your voice humans will
01:06often try to lower the tone of their voice in order to sound more authority so macho men have deeper
01:14voices both of us love big action movies it sounds pretty obvious but how much can the pitch of your
01:22voice actually affect other people's behavior to find out we sent our own cheeky chip to stake out some
01:32personal territory in the middle of a busy train station it's his box and he's going to try and
01:38defend it from the human apes rushing for their trains first he's going to use a soft and high tone
01:47of
01:47voice let's see if anyone obeys his voice let's see if anyone obeys his orders get out of my box
01:52get out my
01:53box get out my box get out my box get out of my box get out my box no one
02:03could be less interested in
02:04Get out of my box! Get out of my box!
02:08He can't stop anyone invading his territory.
02:11Get out of my box!
02:13Where's my box?
02:15Now he's going to adopt an alpha-chimp's voice.
02:20Low in tone and loud in volume.
02:24But will anyone really take notice?
02:28Get out of my box! Get out of my box!
02:33Get out of my box!
02:35Suddenly, everyone is going out of their way to avoid trespassing on the alpha-chimp's territory.
02:41Get out of my box! Get out of my box!
02:43No one stops to think why. They're just instinctively doing what he says.
02:48Get out of my box!
02:50They'll even stop in their tracks to obey his unusual but masterful command.
02:56Get out of my box! Get out of my box!
02:59Get out of my box! Get out of my box!
03:02With his alpha voice, our chip has become king of his jungle box.
03:07Get out of my box!
03:07We didn't know actually because some of them are almost stepping into the box and then
03:12stop and then go round.
03:15Just without even consciously being aware of it.
03:20They're so influenced by the authority of his tone that they're obeying his command.
03:26Just like inches.
03:29Get out of my box!
03:30Get out of my box!
03:31Get out of my box!
03:32Thanks.
03:33Get out of my box!
03:35We've already discussed...
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