Sound waves traveling through air are indeed longitudinal waves with compressions and rarefactions. As sound passes through air (or any fluid medium), the particles of air do not vibrate in a transverse manner. Do not be misled-sound waves traveling through air are longitudinal waves.We Would Like to Suggest ...f a sound wave is moving from left to right through air, then particles of air will be displaced both rightward and leftward as the energy of the sound wave passes through it. The motion of the particles is parallel (and anti-parallel) to the direction of the energy transport.
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The file which is added to GWT is the sitemap.xml file... No. As long as you have your sitemap file submitted to Google via GWT, Google will have your URLs. Just make sure you have a sitemap submitted via GWT. This is just telling the Googlebot not to show your xml.gz file in their index/SERPs.