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ACOUSTIC
ENVELOPE DETECTOR
In response to requests from both
University and commercial research departments, Stable Micro Systems
have developed a method of measuring the acoustic energy release
during a physical test. The acoustic system has high sensitivity
to the frequencies emitted by brittle products but has low
sensitivity to mechanical noise emitted by the Texture
Analyser. The system contains all the necessary components for
connection to a TA.XTplus Texture Analyser, which will
generate synchronised force, and sound profiles for individual tests
to provide the "4th dimension in texture analysis". |
Quantify, for example:
The Production of Sound
When a force is applied to any
material, resulting movements within the structure form sound waves.
These sound waves can be monitored as acoustic emissions. The
definition of acoustic emission is the transient elastic wave
generated by rapid release of energy within a material. Another
way to describe this is that when a load is applied to a specimen,
energy is stored as strain energy. When an inherent critical
point is reached in the sample, there is a sudden redistribution of
the energy. At this point some of the strain energy is converted
into acoustic energy.
The Marketing of Sound
Advertising uses onomatopoeia so
consumers will remember their products - words for things are created
from representations of the sounds these objects make. In English,
for example, there is the universal fastener which is named for the
sound it makes: the zip.
In the past few years, advertisers
have made use of the crispness and crunchiness of
foods. Television viewers cannot experience the taste or the
smell of a product being advertised. They can only see it and,
of course, hear it. Advertising the aural assets of a food
acquaints the potential customer with this most important quality
attribute of many products.
The structure of a food and the
mechanical properties of that structure are related to crispness by
their capability to generate the appropriate sound and their ability
to dampen or amplify this sound. The Acoustic Envelope Detector
provides a tool for the quantification of this sound emission whilst
measuring the textural properties of the product.
REQUEST
A BROCHURE
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Systems Ltd