• 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
• Two transducers to allow two dual airflow channels from a single mask
• Calculates nasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100 using airflow giving significantly higher accuracy as compared to acoustic nasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100 measurements

Dual Airflow System Package	Contains: A- FC-1C Flow Calibrator B- MS-110 A-D Transducer Electronics C- OroNasal 2-Chamber CV Teen-Adult Mask with Screen Rings D- (2) PT-2E Pressure Transducers E- BFC-2 Splitter Cable F- Mask Handle for using OroNasal Mask • Dualview Software
Dual Airflow System Add-on Package (For customers who have purchased Aeroview)	Contains: • Low Pressure Transducer (one) • Dualview Software

The Dualview system will display two airflow channels, nominally the oral and nasal airflow waveforms from a dual-chamber Glottal Enterprises CV mask, and compute and display the DC NasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100 (sometimes referred to as "aerodynamic nasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100") from these variables. The DC NasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100 display is comparable to the displays of (AC or acoustic) NasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100 obtained from audio waveforms by the Glottal Enterprises Nasality Visualization System though the scales will not be directly proportional. DC NasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100 has the advantage of providing absolute readings at zero NasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100 (no velopharyngeal leakage) and 100% NasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100 (nasal consonants), and therefore provides a more intuitive display than a conventional nasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100 measurement system.
The DC-NasalanceNasalance is a measure of the degree of velopharyngeal opening in voiced speech formed by computing the ratio of the amplitude of acoustic energy at the nares, An, to the amplitudes of the total radiated acoustic energy, at the mouth and nose, Am +An. The term nasalance usually refers to this ratio as a percentage: An/(Am+An)X100 is computed from the low-pass filtered oral and nasal airflows, Odc and Ndc, respectively. Also displayed is a version of the oral airflow that is low-pass filtered at a selectable frequency of 400, 500, or 600 Hz to show a roughly inverse-filtered representation of the glottal airflow waveform. (The oral airflow can also be more precisely inverse filtered using the Waveview program.) This capability is important in measuring Phonation Threshold PressurePhonation Threshold Pressure refers to the minimum level of lung pressure needed to sustain vocal fold oscillation at a specific pitch (PTP).

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