The Aeroview System, comprised of both hardware and software, is compact, non-invasiveA non-invasive measurement is one that does not require the introduction of instruments into the body, extremely accurate and capable of recording oral airflow, nasal airflow, subglottal pressureSubglottal pressure, or Subglottic pressure, is the pressure that builds up beneath (“Sub-”) the vocal folds. The amount of subglottal pressure generated is determined by the airflow through the leakage of air between the vocal folds and the resistance to that flow and microphone data during speech. Using those recorded signals, Aeroview software can automatically calculate syllable rateSyllable rate is a measure of the number of syllables produced within a given amount of time. A common measure is that of syllables per second, glottal flow resistanceGlottal flow resistance is defined as the average pressure across the glottis divided by the average flow through the glottis. Generally only defined for voiced speech or singing, average subglottal pressureSubglottal pressure, or Subglottic pressure, is the pressure that builds up beneath (“Sub-”) the vocal folds. The amount of subglottal pressure generated is determined by the airflow through the leakage of air between the vocal folds and the resistance to that flow, oral and nasal airflow (volume and rate), pitchPitch is the perceived tone frequency of a sound in comparison with the perceptively best match with a pure sinusoid, vital capacityVital capacity is the greatest volume of air that can be expelled from the lungs after taking the deepest possible breath, and more.

As seen above, the system uses a handheld mask with transducers, a data acquisition box with USB interface, and software which can be run on any Windows PC or laptop. Acquiring data is easy: Your test subject vocalizesutter a sound or word into the mask, and data is recorded and immediately visualized onscreen by the software. As seen below, the user simply selects desired data, and Aeroview instantly performs your calculations. A key strength of the mask used is that it causes little to no distortion of the voice, so the subject’s speech may be simultaneously recorded by a microphone without affecting intelligibility.

Aeroview’s most popular applications include: Phonation Threshold PressurePhonation Threshold Pressure refers to the minimum level of lung pressure needed to sustain vocal fold oscillation at a specific pitch measurement (also known as Collision Threshold PressurePhonation Threshold Pressure refers to the minimum level of lung pressure needed to sustain vocal fold oscillation at a specific pitch), finding glottal flow resistanceGlottal flow resistance is defined as the average pressure across the glottis divided by the average flow through the glottis. Generally only defined for voiced speech or singing, and voice fundamental frequencyThe Fundamental frequency is the inverse of the period of a periodic or quasi-periodic waveform. It is the lowest frequency, and generally the highest amplitude component, of all the individual harmonic sinusoidal waves that add up to create voice source in a Fourier analysis, it reflects the rate at which the vocal folds vibrate. Its psychological correlate is pitch studies.

What else is the Aeroview System capable of? Any speech or singing application that requires visualizing and comparing airflow data. Our engineers will work with you to ensure that you can easily collect the data that you need for your unique study. Airflow data is recorded in a standard, convenient .wav format. This allows you to import your data into other software packages if you’d like to.

An important feature of the Aeroview program is that the approximate syllable rateSyllable rate is a measure of the number of syllables produced within a given amount of time. A common measure is that of syllables per second is automatically computed by the program and displayed on-screen. This allows the user to eliminate syllable sequences which were pronounced outside the optimal 2.0/second to 3.5/second range. The Aeroview System is available as AeroviewPro and AeroviewPlus. AeroviewPro provides the standard measurements of phonatory aerodynamics, as described above. AeroviewPlus consists of the AeroviewPro system bundled with the Waveview program for obtaining the glottal waveform by inverse filtering.

The Aeroview System calculates the ‘average glottal flow resistance’ during vowel production, Rg, and its reciprocal, the ‘average glottal flow conductance’, Gg., using an automated factory-optimized algorithm. The average glottal airflow and interpolated subglottal pressureSubglottal pressure, or Subglottic pressure, is the pressure that builds up beneath (“Sub-”) the vocal folds. The amount of subglottal pressure generated is determined by the airflow through the leakage of air between the vocal folds and the resistance to that flow used in the calculation are also displayed. Aeroview is a natural complement to Waveview, our program for analyzing glottal airflow waveforms by means of inverse filtering. As with Waveview, we have kept the user interface simple and intuitive to make it useful for students as well as voice researchers. Lines on the Aeroview screen show the automated measurement procedure for each syllable measured, as in the above annotated figure, so that the user can easily spot measurement errors.

The FC-1 and PC-1 calibrators provide an easy, accurate and economical means for calibrating all Glottal Enterprises systems for recording airflow and pressure. Operation is simple enough so that calibration can be quickly checked before each measurement series to verify that system parameters have not been changed.

AeroviewPro (Phonatory Aerodynamics System)	Includes: A- PC-1H Pressure Calibrator B- FC-C Flow Calibrator C- MS-110 A-D Electronics Unit D- PT-2E Transducers D- PT-25 Transducer E- BFC-2 Cable F- OroNasal 2-chamber CV Teen-Adult Mask with screen rings G- OroNasal 2-chamber CV Child Size Mask with screen rings H- Mask Handle for using OroNasal Mask I- Oral Pressure Adapter with 10 pressure sensing tubes • AeroviewPro Software
AeroviewPlus	• AeroviewPro (all components above) + WaveviewPro Software

Detailed Features in PDF

• Compatibility with Windows XP/Vista/7/8/10
• Powered by USB or external power supply
• Data automatically saved in standard 2-channel .wav format
• Adjustable gains to accommodate very quiet speech as well as loud singing
• OroNasalRelating to the mouth and nose mask for minimal acoustic distortion
• Interchangeable transducers for airflow, intraoral pressurePressure within the mouth when the lips and the velopharyngeal passageway are closed, and high intraoral pressure
• Automatically calculates:
• Syllable rateSyllable rate is a measure of the number of syllables produced within a given amount of time. A common measure is that of syllables per second
• RgGlottal flow resistance is defined as the pressure across the glottis divided by the flow through the glottis
• Average PressureAverage subglottal or intraoral pressure. Usually as measured using low pass filtering to eliminate the acoustic energy
• Flow (in mL/sec)The volume velocity of the airflow through a crossection of the flow path, as through the nares, through the glottis, or through the mouth
• Pressure/FlowSubglottal pressure divided by airflow
• Flow/PressureAirflow divided by subglottal pressure
• SPL (in dB)Sound pressure level is a logarithmic measure of the RMS sound pressure of a sound relative to a reference value, the threshold of hearing. It is measured in decibels (dB)
• Pitch (in Hz)Pitch is the perceived tone frequency of a sound in comparison with the perceptively best match with a pure sinusoid
• Vital CapacityVital capacity is the greatest volume of air that can be expelled from the lungs after taking the deepest possible breath