Portable nasometry unit

Nasality Microphone

Portable nasometry unit

The Nasality Microphone is a handheld nasometry unit that detects nasality in speech production. It uses a lightweight acoustic separator that is fitted with highly directional nasal and oral microphones. The portable design and USB compatibility makes the Nasality Microphone ideal for clinical or home-based speech therapy.

How nasometry works

How nasometry works

The Nasality Microphone uses a special lightweight acoustic separator that is positioned above the upper lip. The acoustic separator is fitted with independent nasal and oral microphones.

Nasality is represented by a numerical value called nasalance, which is defined as the percentage of the total acoustic energy that is nasal:

Acoustic Nasalance

Nasalance can be monitored in real-time for biofeedback therapy, or recorded for off-line assessment.

Compatible software


The Nasality Microphone comes complete with NasalanceViewer, an easy-to-use Windows application that supports the following features:

NasalanceViewer box
Provides real-time visual feedback of nasalance
Provides off-line objective analysis of nasalance
Provides auditory playback of speech production
Waveform display with adjustable target cursor
Skywriter game with adjustable target cloud
Simple to use interface, ideal for home use
Windows 10, 8, 7, Vista and XP compatible
Desktop, laptop and tablet compatible

icSpeech Professional Edition

The Nasality Microphone is also compatible with icSpeech Professional Edition (sold separately), which supports a wealth of additional features, including:

icSpeech Professional Edition
Additional displays: bar, waveform, spectrogram and video
Additional parameters: nasalance, pitch, timing, nasal and oral acoustic energy
Six games with adjustable targets and rewards
Extensive analysis features
Recorder with picture and word prompting
Combines nasometry with EPG, airflow, voicing and video data
Windows 10, 8, 7, Vista and XP compatible
Nasalance Bar Nasalance real-time waveform Games

Bar display

The real-time Bar is a useful biofeedback tool that shows a simple bar, which moves upwards with increased nasalance. This allows the user to monitor nasality, make corrections, and instantly see the result.

Waveform display

The real-time Waveform display is often used in therapy because it allows the user to see the dynamics of their speech during the utterance of complete words or phrases.


Each of the six interactive games feature adjustable targets, rewards and can be controlled with nasalance, pitch, nasal or oral acoustic energy.

System requirements

Supported operating systems Windows 10, 8, 7, Vista, XP
Supported computers Desktop, laptop, tablet
CPU Minimum 1 GHz IntelĀ® PentiumĀ® or equivalent
Memory Minimum 1 GB of RAM
Storage 100 MB of free hard disk space
Connectivity USB 1.0, 2.0, 3.0
Power USB bus powered

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Nasality Microphone Package

Package includes:

  • Nasality Microphone
  • NasalanceViewer software
  • Carry case
  • Four microphone windshields
  • User manual
  • 12 months guarantee
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"Thanks so much for your help and speedy response.

We are being supported by the team at The Spires clinic in Salisbury Hospital. They are an amazing team of experienced and friendly staff and have enabled our daughter to communicate both through operations and speech therapy over the last 8 years.

We are currently working with Philippa Humes who has loaned us the microphone to practise with our daughter inbetween sessions.

She has some mild learning difficulties and visual aids really help with her learning. I'm finding the software adds an element of fun to the sessions which could otherwise prove a little tedious and it also helps me to listen for and recognise subtle sounds I wouldn't normally pick up on.

I'm hoping it will help us to continue to fine tune her speech and help to reduce the nasal quality she still has with certain sounds."

United Kingdom


"I tested your device using various speech samples (mainly, /ba-ba-ba/; /ma-ma-ma/; babababa/) mimicking various nasality severities. It worked beautifully and in my opinion it is very reliable. Great job for a reliable device with a reasonable price."

General Abdelrahim Attieh, Ph.D., SLP, Consultant Speech, Voice, & Swallowing Specialist
King Hussein Cancer Center
Amman, Jordan