1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Assessing the low frequency acoustic characteristics of Macrocystis pyrifera, Egregia menziessi, and Laminaria solidungula
Rent:
Rent this article for
USD
10.1121/1.4802637
/content/asa/journal/jasa/133/6/10.1121/1.4802637
http://aip.metastore.ingenta.com/content/asa/journal/jasa/133/6/10.1121/1.4802637

Figures

Image of FIG. 1.
FIG. 1.

(Color online) An example of the system's resonance frequency and the slope used to calculate sound speed. This example is from a control replication of the trials.

Image of FIG. 2.
FIG. 2.

Pictures of (a) , (b) , and (c) frond segments. The black arrows denote locations of pneumatocyst structures.

Image of FIG. 3.
FIG. 3.

Empirical relationship between air volume within the pneumatocysts and kelp wet mass for individual (  = 0.90;  < 0.05) and (regression not significant) frond sections. Measurement uncertainty is ± 0.15 ml and ± 0.005 g for air volume and wet mass, respectively.

Image of FIG. 4.
FIG. 4.

Decrease in effective sound speed in relation to free gas volume within pneumatocysts for (  = 0.70;  < 0.05) and frond sections (  = 0.82;  < 0.01). The slope of the regression was significantly greater for compared to ( = 2.40;  < 0.05). Measurement uncertainty is ±0.15 ml and ±4 m s for air volume and effective sound speed, respectively.

Image of FIG. 5.
FIG. 5.

Decrease in effective sound speed in relation to total biomass for (  = 0.75;  < 0.05), , and (regressions not significant). Measurement uncertainty is ±0.005 g and ±4 m s for air wet mass and effective sound speed, respectively.

Image of FIG. 6.
FIG. 6.

Effective sound speed of air-filled pneumatocysts compared to water-filled pneumatocysts of the same frond segments for (a) and (b) Measurement uncertainty is ±4 m s for effective sound speed.

Image of FIG. 7.
FIG. 7.

Change in effective sound speed upon air removal within pneumatocysts for and frond segments. Trials for both species were plotted together (regression was not significant). Measurement uncertainty is ±0.15 ml and ±4 m s for air volume and effective sound speed, respectively.

Image of FIG. 8.
FIG. 8.

Effective sound speeds predicted by Wood's two-phase medium model for air and water components compared to observed effective sound speeds for frond segments of (a) and (b) A student's paired -test revealed a significant difference between predicted and observed effective sound speeds for both and experiments ( < 0.01).

Tables

Generic image for table
TABLE I.

Model parameters obtained from morphological measurements and acoustic resonator experiments used to test multi-phase medium models. and values are based on results from the derivation of Wood's two-phase medium model (Ref. ). Values represent mean ± standard deviation for ( = 6), ( = 6), and ( = 5).

Generic image for table
TABLE II.

Results of the experiments that examined the acoustic significance of air-filled and water-filled pneumatocysts. The superscripts correspond to the air-filled () and water-filled () pneumatocysts, respectively.

Generic image for table
TABLE III.

The measurements of kelp morphology for the specimens used in the modeling experiments. Each trial represents an independent replication of the resonator experiment.

Loading

Article metrics loading...

/content/asa/journal/jasa/133/6/10.1121/1.4802637
2013-06-05
2014-04-16
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Assessing the low frequency acoustic characteristics of Macrocystis pyrifera, Egregia menziessi, and Laminaria solidungula
http://aip.metastore.ingenta.com/content/asa/journal/jasa/133/6/10.1121/1.4802637
10.1121/1.4802637
SEARCH_EXPAND_ITEM