acoustic shadow
sound shadow

If you stand in an acoustic shadow there is one direction from which you will hear nothing.

As one website refers to it, "an acoustic shadow is to sound what a mirage is to light".

An acoustic shadow can be created by terrain as well that will leave spots that can't easily hear sounds from a distance.

It casts what is known as an acoustic shadow, which blocks passage of the higher frequencies from one side of the head to the other.

(These voids are also visible in the previous image as dark acoustic shadows.)

Then he remembered that there are natural phe- nomena to which some one has given the name 'acoustic shadows.'

Due to a possible acoustic shadow Ord's forces were never engaged and Rosecrans fought alone.

Acoustic Shadows - What is an acoustic shadow and how does it work?

An acoustic shadow apparently prevented Grant and Ord from hearing the sounds of the battle starting.)

Civil War Acoustic Shadow.

He lowered it to a depth of twenty feet to assure that it was out of the acoustic shadow of the boat's hull.

Slocum later claimed that he had been unaware of the start of the battle, possibly because of an "acoustic shadow" caused by intervening hills.

Higher values of wind gradient will refract sound downward toward the surface in the downwind direction, eliminating the acoustic shadow on the downwind side.

A head shadow or acoustic shadow is a region of reduced amplitude of a sound because it is obstructed by the head.

On September 19, during the battle of Iuka, a fresh north wind caused an acoustic shadow that prevented Ord from hearing the battle.

An acoustic shadow is an area through which sound waves fail to propagate, due to topographical obstructions or disruption of the waves via phenomena such as wind currents.

Since temperature and sound velocity normally decrease with increasing altitude, sound is refracted upward, away from listeners on the ground, creating an acoustic shadow at some distance from the source.

It was an acoustic Shadow Project album which also featured guitarist/producer Michael Ciravolo and keyboardist Nathan Van Hala of Saviour Machine.

Besides the thermocline, acoustic shadows, light absorption, water density and temperature differentials, not to mention the hull materials and propulsion methods, as well as the concentration of traffic make tracking nearly impossible."

Rosecrans won a minor victory at the Battle of Iuka (September 19), but poor coordination of forces and an acoustic shadow allowed Price to escape from the intended Union double envelopment.

Johnston was only 2 miles from the front, but an acoustic shadow prevented him from hearing the sounds of cannons and musketry and he and his staff did not know the battle had begun until 4 p.m.

Although Grant and Ord planned to attack in conjunction with Rosecrans when they heard the sound of battle, an acoustic shadow suppressed the sound and prevented them from realizing that the battle had begun.

In the acoustic shadow of the blaring speakers, we approached one half of BROOKS and DUNN, that is, Kix Brooks, who was wearing his trademark black cowboy hat.

I was standing in the acoustic shadow of a large ornamental pillar, surveying the scene in my detached or Somerset Maugham manner, when I noticed that someone was looking at me with that "Haven't we met before?"

Her first UK collection, Intimate Geography, which is a selection from four of her Australian collections (Acoustic Shadow, Mines, Friendly Fire and Pirate Rain), was published by Bloodaxe Books in March, 2012.