How does real-time speech transcription work?

Real-time speech transcription uses your device microphone to capture audio and converts it to text using speech recognition. LSTN displays the transcribed text on your screen as words are spoken, allowing you to read what is being said in real time.

Speech to Text

Read What People Are Saying in Real Time

Q: Can real-time captions replace hearing aids?

No. Real-time captions are a practical communication aid, not a medical treatment. They can help you follow conversations in situations where listening is difficult, but they do not address the underlying hearing loss. If you have hearing loss, a professional evaluation and hearing aids are the appropriate clinical response.

By Dan McCoy, Audiology Industry Professional · Updated June 2026

Struggling to follow conversations in noisy restaurants, meetings, or group settings? Live captions of what people are saying — on your screen, in real time. If you find yourself relying on this more and more to follow conversations you used to hear just fine, that's worth paying attention to. The free hearing test is a good next step.

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LSTN speech-to-text app displaying real-time captions on iPhone

Who It Helps

For Anyone Who Struggles to Follow Conversations

What is Real-Time Speech-to-Text?

Real-time speech-to-text transcription converts spoken words into text as they are spoken, displaying captions on your screen with minimal delay. It uses your device microphone to capture audio and speech recognition to identify words, letting you read what people are saying rather than straining to hear them.

Real-time speech transcription is not just for people with severe hearing loss. It is useful for anyone whose hearing makes certain situations harder than they should be.

Noisy restaurants and bars

Background noise drowns out individual voices. Captions let you follow the conversation at the table without asking people to repeat themselves.

Group meetings and conferences

Multiple speakers, side conversations, and room acoustics make meeting rooms challenging even with mild hearing loss.

Talking with people who wear masks

Masks reduce the audibility of consonant sounds and remove lipreading cues. Captions compensate for both.

Phone and video calls

Call quality, accents, and speaker characteristics all reduce clarity. Captions help fill the gaps.

Watching TV without disturbing others

Use captions to follow content at a lower volume, or in situations where turning up the TV is not an option.

People with accented speech

Unfamiliar accents require more cognitive effort to decode. Captions reduce the mental load of listening.

Why It Happens

Why Noisy Places Are So Hard

Understanding speech in noise is one of the most demanding tasks the auditory system performs. It requires the brain to separate a target voice from competing sounds, fill in masked phonemes, and track the rhythm of speech — all simultaneously.

Hearing loss makes this harder because it tends to affect the high frequencies (consonant sounds like S, F, TH, K) before the low frequencies (vowel sounds). Consonants carry most of the meaning in speech. When they are masked by noise, words become impossible to distinguish even at a comfortable volume.

Speech-in-noise difficulty is often the first symptom of hearing loss that people notice — and it is frequently dismissed as a concentration problem before the underlying hearing issue is identified.

Source: American Speech-Language-Hearing Association (ASHA)

If this describes your experience, a hearing screening is a good starting point.

How It Works

Live Captions in Three Steps

Open Transcribe

Launch LSTN and open the Transcribe tool. Grant microphone access when prompted.

Point toward the speaker

Hold your phone so the microphone faces the person speaking. Captions appear on screen as words are spoken.

Read in real time

Words appear with minimal delay. Keep the screen visible to follow the conversation without lip reading.

Common Questions

Speech to Text FAQ

What is speech-in-noise difficulty?

Speech-in-noise difficulty is the inability to understand speech clearly when background noise is present, even when overall hearing thresholds may be normal or near-normal. It is one of the most common first symptoms of hearing loss and often precedes measurable changes on a standard audiogram.

How accurate is the real-time transcription?

Accuracy depends on audio quality, accent, and background noise. In a quiet environment with a clear speaker, accuracy is very high. In noisy conditions, accuracy decreases — but so does your ability to hear, which is exactly when captions are most useful.

Does it work without an internet connection?

The Transcribe tool currently requires an internet connection for speech recognition processing. A stable connection gives the most consistent results.

Can real-time captions replace hearing aids?

No. Captions are a practical communication aid, not a clinical treatment. They help you follow conversations in challenging situations but do not address underlying hearing loss. If you have hearing loss, a professional evaluation and hearing aids are the appropriate clinical response.

Is Transcribe useful for people without hearing loss?

Yes. Anyone who struggles in noisy environments, talks with people who have strong accents, or needs to follow conversations in a second language can benefit from real-time captions.

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