Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
  • G01N29/04—Analysing solids
  • G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
  • G01N29/22—Details, e.g. general constructional or apparatus details
  • G01N29/223—Supports, positioning or alignment in fixed situation
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N2291/00—Indexing codes associated with group G01N29/00
  • G01N2291/02—Indexing codes associated with the analysed material
  • G01N2291/023—Solids
  • G01N2291/0235—Plastics; polymers; soft materials, e.g. rubber
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N2291/00—Indexing codes associated with group G01N29/00
  • G01N2291/10—Number of transducers
  • G01N2291/101—Number of transducers one transducer

Definitions

• the present invention relates to a device and to a method for acoustic sensorial analysis of materials.
• the present invention also relates to an acoustic sensorial analysis method according to claim 11.
• figure 1 is a diagrammatic perspective view of a device according to the present invention, broken down into its elements;
• figure 2 is a diagrammatic perspective view of the device in figure 1, in a first mode of use;
• figure 3 is a diagrammatic perspective view of the device in figure 1, in a second mode of use.
• numeral 1 indicates as a whole a device for the acoustic sensorial analysis of materials .
• Device 1 generally appears in the form of a kit housed in a briefcase 2, and essentially comprises a support frame 3, and a plurality of accessories, collectively indicated by reference numeral 4.
• Frame 3 comprises a lower, substantially square surround 5 and an upper surround 6 hinged onto a side of the lower surround 5 about a horizontal axis movable between a horizontal resting position (figure 1), on which it rests on the lower surround 5 and allows to place the frame 3 into the briefcase 2, and an operative vertical position (figure 2) .
• the accessories 4 may comprise, for example:
• a plurality of sticks 7, 8, 9 of various materials e.g. plastic material, wood, steel, which are each conveniently provided with an end eyelet 10;
• a plurality of resting planes 14 made of various materials, e.g. glass, plastic material, wood, steel (only one of which is shown) ;
• a clip 16 to repeatably hold sheet materials (thin plates, fabrics, etc.);
• frame 3 comprises a crosspiece 17 connecting opposite sides 18, 19 of the upper surround 6 and carrying a constraining element 20 for the accessories 4.
• the constraining element 20 comprises, in particular, a sleeve 21 with horizontal axis A, in which a handle 24 of the measuring cup 15 is adapted to be rotationally engaged (fig. 3) .
• a pin 25 radially extends along an axis B which is horizontal and perpendicular to axis A, to which the sticks 7, 8, 9 are adapted to be hinged by means of the respective eyelets 10.
• the measuring cup 15 is conveniently provided with a side arm 26, by means of which it may be manually rotated about axis A.
• the lower surround 5 of frame 3 has an inner peripheral ridge 27 (figure 2), on which a series of bars 22 may alternatively rest to support a test material or a plane 14.
• FIGS 2 and 3 show two different exciting modes for two different test samples.
• the samples are essentially characterized by the constituent material and the configuration form (plate, section bar, sheet, fabric, gel, granules, net, etc.).
• a sample consisting of a plate L made of plastic material is analyzed from an acoustic point of view.
• the most significant exciting form is the percussion by means of a stick 7, 8 or 9.
• plate L is arranged in the frame 3, supported by the bars 22 arranged parallel to one another and resting at the ends on the peripheral ridge 27.
• the stick made of the material chosen for the test (e.g. stick 7) is constrained to the pin 25 of the constraining element 20 by means of the eyelet 10, so that it can rotate about axis B.
• the sound thus produced may be recorded by means of a microphone 30 connected to any recording device (not shown), e.g. a computer provided with a sound acquisition program.
• the material is in the form of granules G, which are arranged in the measuring cup 15 rotationally mounted about axis A.
• the test consists in rotating the measuring cup 15 by 180° so as to make the granules G fall on a plane 14 made of a chosen material, mounted in the lower surround 5 of frame 3 so as to rest with its peripheral edge on the ridge 27.
• the evaluation method used is thus based on the principle that the nature of a sound is influenced by three essential elements:
• the produced sound is acquired for each material/configuration form/exciting mode combination.
• the recorded and stored sound sample repeatably objectively reflects the combination of examined parameters.
• the descriptors used are, for example, those known in literature as "Von Bismarck's adjectives" (Von Bismarck, G. "Timbre of steady sounds: a factorial investigation of its verbal attributes” in Acustica, 1974, n. 30, p. 146-159), and are combined to the sounds by means of a reliable (reproducible in statistic terms when carried out in a suitable manner) , pertinent and consistent procedure, with the use of a trained sensorial group (acoustic "tasters", i.e. a group of experts, appropriately guided in acoustic sensorial analysis ) .
• a trained sensorial group acoustic "tasters" i.e. a group of experts, appropriately guided in acoustic sensorial analysis
• the tasters' choices are analyzed by means of the Borda method by assigning different scores to the first choice, to the second choice and to the third choice, which allows to associate the most pertinent descriptor with each sound. It is worth noting that, although referred to sensorial, non-quantitative features, the method described is metrologically valid because, on the basis of past experiences, it leads to a statistically reliable sound-descriptor association.
• a database can be created in which a descriptor of the produced sound is associated with each material/configuration form/exciting mode parameter combination .
• Such a database may assist designers in determining the materials during the step of designing.
• the device allows to produce comparable results even if it is used by different people in different contexts.

Landscapes

• Physics & Mathematics (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Analytical Chemistry (AREA)
• Biochemistry (AREA)
• General Health & Medical Sciences (AREA)
• General Physics & Mathematics (AREA)
• Immunology (AREA)
• Pathology (AREA)
• Acoustics & Sound (AREA)
• Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
• Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43976422

Family Applications (1)

Country Status (3)

Families Citing this family (1)

Family Cites Families (1)

• 2011
  • 2011-02-03 IT ITTO2011A000089A patent/IT1403809B1/en active
• 2012
  • 2012-02-03 EP EP12707918.4A patent/EP2671073A1/en not_active Withdrawn
  • 2012-02-03 WO PCT/IB2012/050519 patent/WO2012104825A1/en not_active Ceased

Non-Patent Citations (2)

Also Published As

Similar Documents

Legal Events