Utility pole wood plies with stress wave acoustic velocity
greater than 5,000 m/s were considered to be stronger and were, therefore, used as surface plies (top and bottom).
The primary variables for the direct BEM are the acoustic pressure and acoustic velocity
p], but normalized with the acoustic velocity
in water [v.
During Phase I of this project, we discovered that UNCD exhibits the highest known acoustic velocity
of any material, which directly translates to higher resonator frequencies and thus device performance," said ADT's chief technology officer, John Carlisle.
Therefore, loudspeaker diaphragm materials are required lightweight and highly rigidity for improving acoustic velocity
as well as preventing unnecessary resonance.
Future UNCD products will leverage more of the properties of diamond such as its acoustic velocity
, thermal, dielectric, and electrochemical properties to make high performance devices such as real-time, portable biosensors that protect our soldiers from weaponized pathogens, high-frequency chips to enable secure wireless communication for cell phone and military applications, and electrodes for water purification," said Carlisle.
Two piezoelectric transducers, acting as transmitter and receiver alternately, are mounted on opposite outside of the pipe at a fixed axial separation, and ultrasonic waves are transmitted simultaneously in opposite directions from one to the other The component of flowing velocity along the acoustic path adds to the acoustic velocity
in the downstream direction but subtracts in the upstream direction, thus making the upstream transit time larger than the downstream transit time.
Part of the samples has undergone more specialized measurements of acoustic velocity
, thermal conductivity, resistivity, and mercury injection.
Measurements of acoustic velocity
and attenuation can be used for the calculation of the components of a complex longitudinal or shear modulus when a longitudinal or shear wave propagates through the sample.
The thickness can be determined from the time of propagation of the acoustic wave between the upper and lower surfaces of the oil slick and knowledge of the acoustic velocity
Fred Cotaras, Chief Technology Director, UEMS particularly values this opportunity to see our high-performance low-frequency acoustic velocity
sensor, the core of our DIFAR sonobuoy technology, being used for scientific and environmental research.
Cubic relationships were found between stress wave acoustic velocity
and the number of utility pole plies contained in the laminated crossarms.