The sound of your voice is like a cake: it’s the delicious result of different ingredients mixed together. This includes your cadence, tone, speed, and volume, all of which add up to the final result. For presenters, being understood is everything. But even more than this, studies suggest that people determine how trustworthy or dominant you are within the first 500 milliseconds of hearing your voice.

The pressure may seem enormous for you to improve your speaking voice with a stat like that. Do you mumble? Speed through your sentences? Speak too loudly or softly? This guide can be a great starting place to improve your voice before your next big presentation. If the sound of your voice is like a cake, let’s make it a gigantic competitive wedding cake on the Food Network.

Your Guide to Developing a Stronger Speaking Voice

How It Works

Before you can stand in front of a crowd and talk about anything that pops into your head, the body goes through three main processes for voice production:

The Lungs – The fuel for your voice is collected here from the air that you inhale and exhale. When we breathe in, the rib cage expands and our diaphragm lowers. Then as we breathe out, the air leaves our lungs and creates a stream in the trachea which energizes the vocal chords and vocal box to produce sound. Think of a wind instrument like a flute or a trumpet; without the air rushing through it, it’s just collecting dust in silence.

The Vocal Box/Chords – Once the lungs have begun the process of pushing air through the trachea, the larynx (AKA voice box) and two vocal chords on top of the windpipe are ready to work. As the air passes between the chords, they vibrate from 100 to 1000 times per second, which determines the pitch of our voice. Depending on how long and tense the chords are, our voice creates a unique sound as the air gets them moving.

Projection – Even without air passing through, you can make a “buzz” noise with the vocal chords in your throat, also known as a hum. This ability is part of what’s called the “resonator system,” basically any part in our body that can project sound. The throat, nose, and mouth are all included along with the vocal chords.

Anything that affects the lungs, vocal box, chords, or projectors can affect the sound of your voice. If you’ve experienced the pain of allergies and a scratchy throat, or even have heard the sound of a long-time smoker, you can see the way this system is affected. Our voice is the result of a complex, unique bodily system working in harmony, so don’t mess it up!

What To Focus On

Your Guide to Developing a Stronger Speaking Voice

Psychologists from the University of Glasgow and Princeton released a study about how we perceive voices, for better or worse:

The study found that males who raised their tone and women who alternated the pitch of their voices are seen as more trustworthy. Dominance is partly indicated by lowering the pitch, but more so by changes in ‘formant dispersion’, which are adjustments of your voice caused by the structure of your throat.The fact that the human mind is capable of coming to these conclusions so quickly and irrespective of visual cues implies that this is an ability that may have evolved in our recent history when decisions on who to trust and approach were crucial to our species’ survival.” (Source article)

Your voice is going to exhibit unique traits no matter how much work you put into correcting vocal errors; the goal is instead to improve what can be changed and thus be perceived as a dominant, confident, and energetic speaker.

Before you focus on specific areas, record yourself. There is often a large difference between what we are hearing and what others are perceiving. The scientific explanation is that sound reaches our inner eat by two separate paths: through the air that travels into our ear and through bone-conducted sound through the tissues of the head. When we speak, we hear both. Others are only hearing the air-conducted version. It’s important to understand how your audience will hear you, so record your entire presentation and listen for:

Volume – Does your voice carry through the entire room? If you were to put your recorder in the back of the room, would it pick anything up? Or are you so loud that you distort the recording?

Speed – How quickly or slowly are you speaking? The ideal speaking rate is 120-160 words per minute; where do you clock in at?

Clarity – Are you missing any words in your presentation due to mumbling or unclear speech? Listen carefully to the recording for any words that might have been missed.

Breathing – Are you rushing through words and gasping for breath? A proper breathing technique is one that goes unnoticed. Think of all of the incredible, speedy rappers that exist like Busta Rhymes. No one has ever heard Busta Rhymes gasping for air, which is why he’s the greatest.

Your Guide to Developing a Stronger Speaking Voice

Pitch – This incorporates the highs and lows of your voice, and as per the study above, is important to vary to keep your audience engaged. Are you as monotone as your least favorite history professor? Or do you have enough ups and downs to rival a roller coaster? There needs to be a happy medium.

How To Practice 

When I use a word,’ Humpty Dumpty said in rather a scornful tone, ‘it means just what I choose it to mean – neither more nor less.” – Lewis Carroll

After recording and re-listening to your presentation, you will probably start to notice weak spots. This might include places where you trail off, speed up, mumble, or sound like a robot. Congratulations! The first step is acknowledging how terrible your voice (can) sound! But like a famous opera singer or even an auctioneer, the next step is to practice away the terrible. Here’s how:

Relax – Start by yawning, wiggling your jaw, humming, and inhaling a large breath for 15 seconds, then release for another 15. Remember all of those stages of vocal production? Most parts of those can be gently warmed up before you practice.

Vocal Exercises – Are you a terrible singer? It doesn’t matter, vocal warm ups are still for you. This can help you enhance projection, work on clarity, and improve breathing techniques. Here is a video of one musical vocal exercise that might turn you into the next Mariah Carey:

Reading Aloud – This can help strengthen your pitch as well as your vocal clarity; start by picking a tricky passage and then adding as much “zest” or variation in your pitch as possible while you read it.

Strength Training – Looking to push it to the limit when it comes to improving your speaking voice? The power of science can back you up. This set of exercises includes everything from a hissing noise practice to saying “ney” at all volumes.

Put A Book On It – To practice mindful breathing techniques, lay down flat on the floor and place a heavy book on your abdomen. Sound crazy? This will help you become more aware as you breath with your stomach, teaching you to control those pesky muscles.

Taking the Stage

The most successful politician is he who says what the people are thinking most often in the loudest voice.” – Theodore Roosevelt

Since the voice is heavily influenced by outside factors, be sure that you take excellent care of your throat, lungs, and vocal chords before your presentation. We have a mini guide of what to drink before a presentation for you to check out. Hint: you shouldn’t be drinking caffeine, alcohol, or any dairy products. All of those can build up mucous or irritate your throat beforehand.

Unfortunately, there isn’t a magical vocal spray that will turn your voice into a Mae West clone. Mindful practice is the key to improving your speaking voice, as is the case with any other element of presentation delivery. But with evaluation, practice, and a few healthy choices, you too can deliver a powerful (and mumble free!) presentation.

Question: How can you improve your speaking voice?

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