| Popis: |
The results of an experimental performance evaluation of a Metadyne chamber in both full anechoic and hemi-anechoic configurations over the frequency range from 60 to 10,000 Hz are presented. The Metadyne anechoic wedge, a fiberglas-filled wedge fully encapsulated in a perforated metal casing, was developed several years ago as an alternative to conventional fiberglas and foam wedges. The results of this evaluation show that the Metadyne chamber meets or exceeds all acoustic performance requirements for proper free field environmental conditions, noise reduction, and inside ambient levels. They also indicate that free field conditions exist much closer than a quarter wavelength from the wedge tips which allows use of nearly all the chamber volume for measurements. This chamber provides an environment for conducting highly accurate sound measurement tests. |
