At first, she thought this might be because she was speaking a foreign language (French). However, even when she was speaking her native tongue (English), things did not improve. The problem was that she had confused volume with pitch, and whenever she wanted to emphasize a word, she simply spoke more loudly. She should have varied the pitch instead.
At the VOX Institute, we worked out that the ideal pitch height for female speakers would be between 190 and 210 Hertz â something used consistently by the British television journalist Julie Etchingham. Another good example for executives to follow is British broadcaster and natural historian David Attenborough at the COP24 Sustainability Meeting in Katowice, Poland, in 2018.
3. Donât overlook the speech rate
Your speech rate â how many syllables you utter per second â makes a huge difference.
As an example, the prison service needed guidance because the guards were having difficulties convincing the prisoners to tidy their cells.
Following a series of workshops, they learned that a falling intonation and a slower rate of speech would help get the message across. In a follow-up session with the guards, they said that since implementing these changes, they had not had a problem with untidy cells.
As a rule of thumb, we have worked out that a speech rate of about 4.5 syllables per second is a good place to start.
4. Fluency is crucial
Fluent speech (infrequent filled pauses/hesitations) is convincing to listeners. Here, eloquence is indissociable from oral delivery. Who does it well? Former US president Barack Obama and former British prime minister Tony Blair remain the world champions in that regard.
Within the world of business, Elon Musk â best known as the owner of automotive group Tesla and X, formerly known as Twitter â is often highly regarded, though this comes with some caveats. From the point of view of clarity â the difference between what he says and how he says it â he is generally fine. However, as there can be a considerable amount of hesitation in his speech, from the listenerâs point of view, he may come across as not very fluent.
If executives are concerned about their fluency, synchronization of hand gestures with the rhythm of the spoken word can help.
5. Keep chunking in mind
Chunking makes a significant difference to whether you are understood by listeners. It is a technique related to short-term memory where you group words into smaller, more manageable units and put a little pause or intonation break in your speech.
If you donât chunk, listeners struggle to understand what you are saying. In fact, the human working memory span is limited to âthe magical numberâ 7 Âą 2 units of information.
Prime ministers and public figures often write their speeches in the form of a poem with line breaks to make themselves pause. It is worth doing the same when you speak to make sure that listeners follow what you are saying.