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The human voice: the instrument we all play. Probably the most powerful sound in the world. Only she can start wars or say "I love you". Nevertheless, many experience that one does not listen to them. Why is this happening? How can we speak so powerfully that we change the world?

There are a few habits that we need to get rid of. For your entertainment, I have gathered the 7 deadly sins of rhetoric here. While this list is not exhaustive, these seven are quite common and can happen to all of us.

First, gossip, talk badly about someone who is not there. Not a good habit, and we know all too well that gossiping people will gossip about us five minutes later.

Second, condemn. We all know people who do this and it is very difficult to listen when you know you are being judged and found to be inadequate.

Third: negativity. It can happen quickly. My mother became very negative in her final years. One day I said to her, "Today is October 1st," and she said, "I know, isn't that awful?" [Laughter] It's hard to listen when someone is this negative.

Another form of negativity is complaining. This is the great art in Great Britain, our national sport. We complain about the weather, sports, politics, everything, but in fact it's viral misery. It does not spread sunshine or lightness in the world.

Excuses. We all know this guy. Maybe we all do. Some just throw guilt around. They pass it on to their whole environment and bear no responsibility. That also makes it hard to listen.

On the sixth point of seven: embellishments, exaggerations. That sometimes degrades our language. When I see something that is really awesome, what do I call it? [Laughter] Of course, this exaggeration becomes a lie. We don't like to listen when we know we are being lied to.

Last but not least: dogmatism, confusing facts and opinions. When these two things merge, you face headwinds. Someone is bombarding you with opinions as if they were facts. Again, it's difficult to listen.

These are the 7 deadly sins of rhetoric. These are things that we have to avoid. But can this topic also be approached positively? Yes. I contend that there are four powerful pillars, foundations that we can build on so that our speech can be powerful and make a difference. Fortunately, they make a word. It is "Hail" and has a great meaning. I'm not talking about hail "hail"] that hits you in the head. By enthusiastically agreeing with someone, I mean the way our words are received, if we stick to them.

So what do they stand for? You might guess. H [honesty] - honesty: to say something correctly, clearly and distinctly. A - Being authentic means simply being yourself. A friend described it as standing by your own truth, which I find a nice description. The I stands for integrity, i.e. doing what you say and being someone you can trust. And the L stands for love. I don't mean romantic love, I mean wishing people good. First of all, because we may not want absolute honesty, such as: "How awful do you look today?" Maybe that's unnecessary. When it comes to love, honesty is great. When you wish someone well, it is very difficult to judge them at the same time. I'm not even sure if that will work at all. So "hail".

So now it came down to what we say, and that is also important. How you say it is just as important. You have a great tool kit. This instrument is incredible and yet only a few people open it. From this toolbox, I'd like to show you a few things that you might want to take away and experiment with. That will make your speech more powerful.

The pitch, for example. Falsetto is usually of little help, but there is another level in between. I don't go into detail - that's what voice trainers do - but you can locate your voice. If I speak through my nose, you hear it; when I go to the neck here where many talk about most of the time. But if you want volume, you have to come down to your chest. Do you hear the difference? We elect politicians with deep voices - it really is - because we associate depth with power and with authority. So much for the pitch.

Now to the timbre. How your voice feels We prefer voices that are rich, smooth, warm, like hot chocolate. If that doesn't apply to you, that's not the end, because that can be trained. Off to the voice trainer. You can achieve a lot and improve the timbre with breathing, posture and exercises.

Then comes the sentence rhythm. This is singsong, the metalanguage with which we convey meaning. She is the main bearer of importance in conversation. If you only speak in a single pitch, you won't listen. When you have no rhythm at all. This is where the word "monotonous" comes from. Then there is repetitive prosody when every sentence ends like a question even though it is a statement. (Laughter) If you do this all the time, it limits your ability to use it as a communication tool, which I find a shame. So let's get used to it.

Tempo. I say something very, very enthusiastically, or I say it slowly to emphasize something, and the intensification of it is our old friend, the silence. There's nothing wrong with a bit of silence in a speech, right? We don't have to fill breaks with "um". Silence can be very powerful.

Pitch often goes with tempo to express arousal, but it also goes like this: Where are my keys? Where are my keys? The meaning varies a little depending on how I say it.

And last but not least: volume. Volume shows my enthusiasm. Hopefully I didn't scare anyone. I can also get you to listen by becoming very quiet. Some people talk like barkers. Try to avoid that. Forcing other people to make their noise with this screeching is ruthless and tactless. Unkind.

Of course, all of this is crucial when you have an important task. That could be a stage appearance and speaking in front of people. It could also be a marriage proposal, a request for a raise, a wedding speech. If it's something important, you owe it to yourself to look at this toolbox and the machine it is supposed to run, and no machine will run well without being warmed up. Warm up her voice.

I would like to show you that. Would you all stand up for a moment, please? I'll show you the six warm-ups I do before each speech. Do these exercises before any important conversation. First: arms up, take a deep breath, and exhale with a sigh, like this: ahhhh. Again: Ahhhh, very good. Now we warm up our lips, and for that we do ba, ba, ba, ba, ba, ba, ba, ba. Very good. And now brrrrrrrrrr, like back then as a child. Your lips should be awake by now. Your tongue is now doing exaggerated la, la, la, la, la, la, la. Beautiful. Really good. And then you roll another R. Rrrrrrr. It's like champagne for the tongue. If I only had one to choose from, I would do the "siren". It starts with "wiii" and becomes "oooh". The "wi" is high, the "oh" is low. So it goes wiiiieeeooooh, wiiiieeeooooh.

Fantastic. The applause is yours. Have a seat, thank you. (Applause)

Do this before your next speech.

Let's get the whole thing right. This is an important insight. That's where we're at, right? We don't talk very well to people who don't listen in the midst of noise and poor acoustics. I've talked about it on this stage at different stages. What would the world look like if we spoke forcefully to people who were listening consciously, and in an appropriate setting? To build a larger context, what would the world look like if we consciously created and consumed sound and tuned our surroundings to the sound? That would be a world that sounds beautiful and where understanding would be the norm, and that is an idea that should inspire.