Comment on “Principles of Sound Ecotoxicology”

Comment on the Coupling of Zero Sound

Features in the zero sound attenuation near the pair-breaking edge in superfluid 3He-B have been observed in large magnetic fields. Schopohl and Tewordt [J. Low Temp. Phys. 57, 601 (1984)] claim that the J = 1−,M = ±1 order-parameter collective modes couple to zero sound as a result of the distortion of the equilibrium order parameter by a magnetic field; they identify the new features with the...

Guidance Document on Aquatic Ecotoxicology

Ecotoxicology.

Sound Reinforcement System Design: Principles and Practice

There are many ways in which a sound reinforcement system can be designed and implemented. These range from traditional "single source" systems to various types of distributed/delayed systems. While certain approaches are generally preferred, the "best match" of sound reinforcement system to acoustic space should be determined based on a number of performance criteria. What these criteria are a...

Ecotoxicology of human pharmaceuticals.

Low levels of human medicines (pharmaceuticals) have been detected in many countries in sewage treatment plant (STP) effluents, surface waters, seawaters, groundwater and some drinking waters. For some pharmaceuticals effects on aquatic organisms have been investigated in acute toxicity assays. The chronic toxicity and potential subtle effects are only marginally known, however. Here, we critic...