Understanding Voice Intensity Score
The Intensity score measures the vocal loudness of a TTS voice on a simple and intuitive 0-to-100 scale. A higher score means a louder, more powerful voice, while a lower score indicates a softer, more subtle delivery.
Intensity Reference Chart
This chart helps you connect the score to a real-world listening experience.
| Intensity Score (0-100) | Perceived Loudness | Feels Like a Voice That Is... |
|---|---|---|
| 0 - 20 | Very Quiet / Whisper | ...whispering or speaking very softly. |
| 20 - 40 | Quiet Conversation | ...having a relaxed, one-on-one chat. |
| 40 - 70 | Normal Conversational Volume | ...giving a presentation or speaking clearly in a group. This is the ideal range for most content. |
| 70 - 90 | Loud / Projecting | ...speaking loudly to be heard in a busy room. |
| 90 - 100 | Very Loud / Shouting | ...shouting or announcing something with high energy. |
Below is a detailed guide to help you understand our Intensity score.
Behind the Score: What 'Intensity' Means
Think of the Intensity score like a speedometer for loudness. Our system first measures the voice's actual loudness in decibels (dB)—the standard unit for sound. We then translate that technical measurement onto our simple 0-to-100 scale.
We've set this scale to cover the entire range of human-like speech, from a whisper (around 50 dB) to a shout (95 dB and up).
So, what does a score of 60 mean?
A voice with an Intensity score of 60 has an average loudness of about 77 decibels (dB). If you look at the chart above, you'll see this is a perfect volume for everyday conversation and most professional uses.
A Few Things to Keep in Mind
The score is an average, not a peak. It measures the overall loudness while the voice is speaking, smoothing out any single loud or quiet words. This gives you a better sense of the voice's typical delivery style.
The 0-100 score creates a level playing field. It allows you to fairly compare the relative loudness of different TTS voices, regardless of which provider made them or how they were engineered.