Showing result: 1 - 10 of 24
Acoustics
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Piezo-Acoustic Transducer
People that use piezoelectric transducers are interested in phased-array microphone, ultrasound equipment, ink-jet drop actuators, drug discovery, Sonar transducers, bio-imaging and acousto-bio-theraputics. Basically anyone who is trying to create sound in air or liquids turns to a version of this p...
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Acoustic-Structure Interaction
Liquid or gas acoustics coupled to structural objects such as membranes, plates or solids are important applications in many engineering fields. Some application examples include:
loudspeakers, acoustic sensors, nondestructive impedance testing, medical ultrasound diagnostics of the human body....
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Acoustic Transmission Loss through Periodic Elastic Structures
In this model, two fluids are separated by a solid elastic structure. An acoustic pressure wave impacts the structure resulting in a reflected wave and a wave transmitted with a loss through the structure. This model investigates the transmission loss through the structure. The effects of incident a...
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The Acoustic Behavior of a Woofer in a Bass Reflex Enclosure
This example models the acoustic behavior of a woofer mounted in a bass reflex enclosure and placed in the corner of a room.
One of the most important design parameters for a loudspeaker driver is its sensitivity as a function of the frequency. To isolate the driver’s performance from that of t...
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Hollow Cylinder
Fluid acoustics coupled to structural objects, such as membranes or plates, represents an important application area in many engineering fields.
Some examples are:
• Loudspeakers
• Acoustic sensors
• Nondestructive impedance testing
• Medical ultrasound diagnostics
This model pro...
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Loudspeaker
A woofer is made from, a cone-shaped diaphragm with a voice coil wound around its apex. When an electric signal is applied to the coil, the coil and the cone start vibrating, creating sound with the same frequency as the signal.
This model computes the coil’s electrical impedance and then feed...
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Eigenmodes of a Room
When designing a concert hall it’s extremely important to take the resonances into account. For a clear and neutral sound, the eigenfrequencies should be evenly spread through the registers. For the home stereo owner, who can’t actually change the shape of his living room, another question is mo...
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SAW Gas Sensor
A surface acoustic wave (SAW) is an acoustic wave propagating along the surface of a solid material. Its amplitude decays rapidly, often exponentially, through the depth of the material.
SAWs are utilized in many kinds of electronic components, including filters, oscillators, and sensors. SAW dev...
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Absorptive Muffler
The sound level from a car depends to a great extent of the quality of the muffler. Over the years, researchers in car industry have struggled to produce mufflers that are efficient in both acoustic and environmental perspective.
This model describes the pressure wave propagation in a muffler for...
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Flow Duct
The modeling of aircraft-engine noise is a central problem in the field of computational aeroacoustics. The acoustic field in a model of an axially symmetric aero-engine duct, generated by a noise source at the boundary, is computed and visualized.
Results are presented for situations with as we...
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