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Related Concept Videos

Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
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Sound Waves: Resonance01:14

Sound Waves: Resonance

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Sound Waves: Interference00:53

Sound Waves: Interference

Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
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Modes of Standing Waves - I

A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This phenomenon...
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Eliciting and Analyzing Male Mouse Ultrasonic Vocalization (USV) Songs
08:44

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Nonlinear acoustic complexity in a fish 'two-voice' system.

Aaron N Rice1, Bruce R Land, Andrew H Bass

  • 1Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA. arice@cornell.edu

Proceedings. Biological Sciences
|May 13, 2011
PubMed
Summary
This summary is machine-generated.

Fishes produce complex vocalizations using a novel swim bladder mechanism, demonstrating nonlinear acoustic signaling similar to frogs, birds, and mammals. This finding suggests widespread evolutionary pressure for sophisticated animal communication.

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Area of Science:

  • Bioacoustics
  • Evolutionary Biology
  • Animal Communication

Background:

  • Vocalizations are crucial for social communication and exhibit diverse evolutionary innovations across taxa.
  • Nonlinear acoustic characteristics enhance vocal complexity beyond simple harmonic or broadband calls.
  • Fishes, despite widespread sound production, lacked evidence for such acoustic innovations.

Purpose of the Study:

  • To investigate the mechanisms and evolutionary significance of acoustic signaling in fishes.
  • To determine if fishes exhibit nonlinear acoustic characteristics previously observed in other vertebrates.
  • To explore the role of the swim bladder in fish vocalization complexity.

Main Methods:

  • Rigorous acoustic and mathematical analyses of toadfish calls.
  • Experimental silencing of the vocal motor system in toadfish.
  • Comparative analysis of acoustic properties across vertebrate lineages.

Main Results:

  • A novel swim bladder mechanism in toadfish generates nonlinear acoustic signals.
  • These nonlinearities are comparable to those found in frogs, birds, and mammals.
  • Fishes have evolved sophisticated nonlinear acoustic signaling, similar to other vocal vertebrates.

Conclusions:

  • Fishes possess advanced nonlinear acoustic signaling capabilities, challenging previous assumptions.
  • The evolution of nonlinearities suggests strong selective pressures for enriched spectro-temporal content in vocal signals.
  • This discovery unifies our understanding of acoustic communication evolution across major vertebrate groups.