Pneumotach
(CV) Masks
MA-1L CV Pneumotach Mask |
Minimizing mask-induced voice distortion and muffling and extending
the frequency response of airflow recordings are key reasons to
choose our circumferentially-vented (CV) pneumotach masks. The
innovative CV design is now widely recognized as far superior in
voice airflow measurement to older, closed-mask designs borrowed
from the field of respiratory measurement. The Glottal Enterprises
PT-2, PT-2E, or PT-25 transducers fit into convenient openings in the masks,
for airflow or intraoral pressure measurements, and when using
the dual chamber masks, nasal flow can also be measured using a
transducer mounted in the mask handle. Other pressure transducers
can be easily adapted for use with any of our pneumotach masks.
 |
| Ergonomically designed
handles are shaped and positioned to allow masks to be held
in place easily and securely. No
straps are needed for most applications. |
OPA Oral Pressure Adapter
 The
OPA adapter permits a PT-25 or PT-70 pressure transducer to be
used to measure intraoral pressure during biabial consonants
by coupling the transducer though the lips at the corner of
the mouth. The adapter seats firmly in the hole provided for
this purpose in any of the Glottal Enterprises MA-series CV
masks. It is easily cleanable and the PVC tube that
passes through the lips is easily replaceable with tubing available
at any hardware store, or purchased from Glottal Enterprises bent into a shape that fits readily into the corner of the mouth. |
|
H-1 Mask Handle
| The H-1 handle is used with any MA-series mask. The solid aluminum handgrip provides a firm handhold in a position designed to hold the mask firmly on the face. The H-1 is easily removable while changing masks or for cleaning, and can be cleaned with soap and water or sterilized by any standard method. |
|
 |
The OroNasal Dual-Chamber
Mask System
| The unique dual-chamber OroNasal mask is used widely in clinics, hospitals and research centers for measuring separated oral and nasal airflow with high fidelity and minimal speech distortion. The OroNasal mask is used in the new Nasality Visualization System, in which both vowel nasalance and the nasal emission of air during consonants is to be recorded and displayed. It is also used in the Speech Tutor pitch and nasality training system. In these applications, the mask pressure for measuring airflow is accessed through the two ports in the distal end of the mask that are also used for holding the mask handle. However dimples in the mask surface conveniently placed on both sides also allow mounting of the standard PT-2E transducer in either chamber. |
Seen here is a close-up of the division between the oral and nasal section of
the mask.
|
S/T-MA1 - Adult Mask |
S/T-MC1 - Child Mask |
O/N-H1 Oronasal Mask
Handle
| Seen here is the O/N-H1 Mask handle. It is a handle
with no electronics in it, and is used with the S/T-MA1 and S/T-MC1
masks when taking pressure readings with Glottal Enterprises
Pressure
Transducers. |
 |
What's so special about the OroNasal mask?
Everything! The OroNasal mask is...
Soft and flexible. Fitting comfortably over
nose and mouth; the OroNasal mask is well suited for long periods of
use, and is easy for children to accept.
 Innovative
and accurate. The Oronasal mask is based
on the clinically proven Glottal Enterprises voice-transparent circumferentially
vented (CV) mask design. With the CV design,
voice muffling is reduced to close to the minimum necessary for speech
airflow measurement. Convenient in the clinic
or at home for speech measurement, the OroNasal mask can have transducers
and electronics conveniently built into the handle.
The OroNasal mask fits over both nose and mouth and separates oral
and nasal airflows. Proprietary pneumotach technology, reduces
cross- leakage of sound between nasal and oral transducers. When
measuring vowel nasalance, the mask design is less susceptible to
ambient noise than is a dual microphone approach and yields a nasalance
measurement that is not dependent on microphone position and orientation.
Pitch measurement is more accurate with a CV mask than with a microphone,
since the mask airflow signal has a much stronger fundamental frequency
component than does a microphone signal.
Non-invasive.
The OroNasal mask can be used to measure nasality in both vowels
and without probes inserted in the mouth or nose.
User-controlled.
The mask works without the uncomfortable, awkward head straps or harnesses
used in some competing systems. The student simply holds the mask in
place when ready to use it. Interruptions that
occur during practice are easily accommodated.
The OroNasal mask, in demand at hospitals and research laboratories
for its accuracy, comfort, and ease of use is now
available for use at home or in the clinic as part of the Speech Tutor
system.
Key benefits of Glottal Enterprises Pneumotach Masks:
- Preserves vowel quality with greatly reduced mask-induced
voice distortion or muffling.
- Suitable for observing individual glottal airflow pulses
by inverse filtering (with the PT-2E transducer).
- With our O/N series of dual chamber OroNasal
masks oral and nasal airflow can be measured simultaneously,
as when measuring nasal emission of airflow caused
by velar insufficiency. (The O/N masks replace the
former MA-1D).
- Can be used for airflow-based sound pressure level
(SPL) measurement that is not dependent on accurate microphone
placement or a sound treated room (when used with a PT-2E transducer).
|
|
