Great Ears: Low-Frequency Sensitivity Correlates in Land and Marine Leviathans

2016 ◽  
pp. 529-538 ◽  
Author(s):  
D. R. Ketten ◽  
J. Arruda ◽  
S. Cramer ◽  
M. Yamato
Keyword(s):  
Low Frequency ◽  
Frequency Sensitivity

scholarly journals Quantum expander for gravitational-wave observatories

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Mikhail Korobko ◽  
Yiqiu Ma ◽  
Yanbei Chen ◽  
Roman Schnabel
Keyword(s):  
Gravitational Wave ◽  
Laser Light ◽  
Low Frequency ◽  
Optical Resonators ◽  
High Signal ◽  
Quantum Uncertainty ◽  
Frequency Sensitivity ◽  
The Past ◽  
Compact Binary ◽  
Binary Mergers

AbstractThe quantum uncertainty of laser light limits the sensitivity of gravitational-wave observatories. Over the past 30 years, techniques for squeezing the quantum uncertainty, as well as for enhancing gravitational-wave signals with optical resonators have been invented. Resonators, however, have finite linewidths, and the high signal frequencies that are produced during the highly scientifically interesting ring-down of astrophysical compact-binary mergers still cannot be resolved. Here, we propose a purely optical approach for expanding the detection bandwidth. It uses quantum uncertainty squeezing inside one of the optical resonators, compensating for the finite resonators’ linewidths while keeping the low-frequency sensitivity unchanged. This quantum expander is intended to enhance the sensitivity of future gravitational-wave detectors, and we suggest the use of this new tool in other cavity-enhanced metrological experiments.

Improvement of the low-frequency sensitivity of MgO-based magnetic tunnel junctions by annealing

2011 ◽  
Vol 109 (11) ◽  
pp. 113917 ◽  
Author(s):  
H. Duan ◽  
H. W. Tseng ◽  
Y. Li ◽  
R. B. van Dover
Keyword(s):  
Tunnel Junctions ◽  
Low Frequency ◽  
Magnetic Tunnel Junctions ◽  
Frequency Sensitivity

Low-Frequency Sensitivity in a Gerbilline Rodent, Pachyuromys duprasi

1991 ◽  
Vol 38 (2-3) ◽  
pp. 115-126 ◽  
Author(s):  
W. Plassmann ◽  
M. Kadel
Keyword(s):  
Low Frequency ◽  
Frequency Sensitivity

scholarly journals Gravitational-wave physics with Cosmic Explorer: Limits to low-frequency sensitivity

2021 ◽  
Vol 103 (12) ◽  
Author(s):  
Evan D. Hall ◽  
Kevin Kuns ◽  
Joshua R. Smith ◽  
Yuntao Bai ◽  
Christopher Wipf ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Low Frequency ◽  
Frequency Sensitivity

Numerical study on the low frequency sensitivity variation of the microphone in laser-pistonphone based primary calibrations

Measurement ◽  
2021 ◽  
Vol 174 ◽  
pp. 108989
Author(s):  
Di Liu ◽  
Aibing Liu ◽  
Fan Zhang ◽  
Xianyue Gang ◽  
Lijun Li
Keyword(s):  
Numerical Study ◽  
Low Frequency ◽  
Frequency Sensitivity

scholarly journals Model-based Energy Path Analysis of Tip-in Maneuvers in a 2WD Vehicle with Range-extender Electric Powertrain Architecture

2021 ◽  
Author(s):  
Raja Mazuir Raja Ahsan Shah ◽  
R. Peter Jones ◽  
Caizhen Cheng ◽  
Alessandro Picarelli ◽  
Abd Rashid Abd Aziz ◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Low Frequency ◽  
Operating Parameters ◽  
High Fidelity ◽  
Frequency Sensitivity ◽  
Centre Of Gravity ◽  
Model Based ◽  
Dominant Component ◽  
Range Extender ◽  
Vehicle Systems

Vehicle driveability is one of the important vehicle attributes in range-extender electric vehicles due to the electric motor torque characteristics at low-speed events. The process of validating and rectifying vehicle driveability attributes is typically utilised by a physical vehicle prototype that can be expensive and required several design iterations. In this paper, a model-based energy method to assess vehicle driveability is presented based on a high-fidelity 49 degree-of-freedom powertrain and vehicle systems. Multibody dynamics components were built according to their true centre of gravity relative to the vehicle datum for providing an accurate system interaction. The work covered a frequency at less than 20 Hz. The results that consisted of the component frequency domination are structured and examined to identify the low-frequency sensitivity based on different operating parameters such as a road surface coefficient. An energy path technique was also implemented on the dominant component by decoupling its compliances to study the effect on the vehicle driveability and low-frequency response. The outcomes of the research provided a good understanding of the interaction across the sub-systems levels. The powertrain rubber mounts were the dominant components that controlled the low-frequency contents (< 15.33 Hz) and can change the vehicle driveability quality.

scholarly journals Magnetic coupling to the advanced Virgo payloads and its impact on the low frequency sensitivity

2018 ◽  
Vol 89 (11) ◽  
pp. 114501 ◽  
Author(s):  
A. Cirone ◽  
A. Chincarini ◽  
M. Neri ◽  
S. Farinon ◽  
G. Gemme ◽  
...  
Keyword(s):  
Low Frequency ◽  
Magnetic Coupling ◽  
Frequency Sensitivity

Development of Low-Frequency Tone Burst versus the Click Auditory Brainstem Response

2005 ◽  
Vol 16 (02) ◽  
pp. 114-121 ◽  
Author(s):  
Raymond M. Hurley ◽  
Annette Hurley ◽  
Charles I. Berlin
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
Tone Burst ◽  
Auditory Brainstem ◽  
Similar Data ◽  
Frequency Sensitivity ◽  
Frequency Tone ◽  
Brainstem Response ◽  
Threshold Testing ◽  
Wave Latency

Often ABR threshold testing employs clicks to assess high-frequency hearing, and low-frequency tone bursts to assess low-frequency sensitivity. While a maturation effect has been shown for click stimuli, similar data are lacking for low-frequency toneburst stimuli. Thus, 305 infants ranging in conceptional age (CA) from 33 weeks to 74 weeks were tested. Absolute latencies were measured for wave V at 55, 35, and 25 dB nHL in response to a click and for wave V500 in response to a 500 Hz tone burst. Major wave latency in response to 500 Hz tone bursts decreases with age and do not stabilize by 70 weeks CA. Likewise, waves III and V latencies in response to clicks decrease with age, as has been reported by others, and do not stabilize by 70 weeks CA. Wave I latency produced by clicks did not decrease with age, being mature by 33 weeks CA.

Sensory relationships of moths and bats sampled from two Nearctic sites

1983 ◽  
Vol 61 (8) ◽  
pp. 1752-1757 ◽  
Author(s):  
James H. Fullard ◽  
M. Brock Fenton ◽  
Caren L. Furlonger
Keyword(s):  
British Columbia ◽  
Low Frequency ◽  
Predation Pressure ◽  
Auditory Sensitivity ◽  
Frequency Sensitivity ◽  
South Central

The auditory sensitivity characteristics of moths sampled in southeastern Ontario and south-central British Columbia were compared in four separate bandwidths from 5 kHz to 110 kHz. British Columbian moths exhibit a significantly greater sensitivity to frequencies from 30 kHz to 75 kHz (midrange) then do their Ontario counterparts. Measurements taken of echolocating bats at both these sites reveal a greater diversity of acoustic frequencies emitted by British Columbia bats and we suggest sympatric moths have responded to this increased predation pressure by selectively maximizing their frequency sensitivity pertinent to the bats they are exposed to. The possibility exists that the low frequency British Columbia bat, Euderma maculatum, may be foraging on moths as a result of its echolocation signals for which sympatric moths show no particular sensitivity.

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