NVS 系统|美国-Glottal|气流气压计|声门下压力测量系统

概览
系统组成
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系统组成

包括:

A- 鼻化度面罩手柄，带有电子元件和USB连接
B- 一套3个隔离挡板（窄，中，宽）
C- 多用户鼻化度隔离挡板的手柄，带有电子元件和USB连接
D- 鼻气流面罩手柄，带有电子元件和USB连接
E- 校准验证管
F- 1个口鼻面罩—成人
G- 1个口鼻面罩—儿童
• 鼻化度软件（含软件手册）
• 鼻气流软件（含软件手册）

NVS 系统

NVS允许测量元音中的鼻化度和压力辅音中的鼻腔气流排放。它结合了鼻腔气流排放和鼻化度系统的功能。该系统测量：鼻腔气流排放：使用Glottal 公司口鼻CV面罩，在需要口腔气压的辅音期间测量并显示通过鼻腔的气流。

鼻化度：通过*先进的标准鼻化度测量措施，使用口鼻CV面罩或方便的隔离挡板手柄。非侵入性测量提供有关元音腭咽闭合的数据，有关更多详细信息，请参阅Nasal Emission和Nasalance页面。

FAQs

1. What are the relationships between the NAS system, the NEM system and the NVS system?

There are a number of ways that our systems for visualizing nasality can be purchased. The full Nasality Visualization System (NVS) includes the capability for measuring Nasal Emission (NEM-1, formerly NE-1) and the system for measuring nasalance (NAS-1 system). As part of the NVS system, the NAS-1 system has both the mask and partition options. (Nasal Emission measurement requires the mask.) There is a price advantage when purchasing the complete NVS system over purchasing the NAS-1 and NEM-1 separately.

2. How does the NEM system for recording nasal emission work? Is it accurate enough for research applications?

The NEM-1 system uses the standard Glottal Enterprises dual-chamber (OroNasal) mask to isolate nasal airflow. The flow rate is measured by a transducer mounted in the mask handle, as is the acoustic signal. The software records and displays both signals simultaneously and they are superimposed on the screen in a chart display. (See the dual-chamber mask and a typical screen at http://www.glottal.com/Products/NVS.htm#NE1.) Average values of NE and SPL can be obtained for a chosen speech segment. You definitely can do research measuring nasal emission with the NEM-1. It is also useful in speech training tasks.

3. Can the so-called SNAP test (Simplified Nasometric Assessment Procedure, as described by Ann W. Kummer in Cleft Palate and Craniofacial Anomalies, Singular Press, 2001) be used with the NAS-1 system?

The SNAP test or its equivalent can be used on any device for displaying nasalance, including ours.

4. Can systems for measuring nasalance be used for measuring nasal emission in pressure consonants?

No. If a manufacturer claims that its nasalance system does measure nasal emission, it is a misstatement

5. Can a system for measuring nasal emission in pressure consonants also measure nasal airflow in vowels?

Yes, though perhaps not as conveniently as with a system measuring naslance.

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