Chapter 12-Sound

________ is a procedure that uses ultrasound to look at tissues and organs inside the body.

Ultrasonography

________ may be heard more than once due to successive or multiple reflections.

Echoes

________ is produced by animals such as dolphins, bats and porpoises.

Ultrasound

Rhinoceroses communicate using ________ of frequency as low as 5 Hz.

infrasound

________ are made to reflect from various parts of the heart and form the image of the heart.

Ultrasonic waves

________ produce low- frequency infrasound before the main shock waves begin which possibly alert the animals.

Earthquakes

The ________ is used to determine the depth of the sea and to locate underwater hills, valleys, submarine, icebergs, sunken ship etc.

sonar technique

________ is unpleasant to the ear.

Noise

The matter or substance through which sound is transmitted is called a(n) ________.

medium

________ means a kind of rapid to and fro motion of an object.

Vibration

________ consists of a transmitter and a detector and is installed in a boat or a ship.

Sonar

The ________ converts the ultrasonic waves into electrical signals which are appropriately interpreted.

detector

auditorium

In a(n) ________ or big hall excessive reverberation is highly undesirable.

rich quality

Music is pleasant to hear and is of ________.

The ________ produces and transmits ultrasonic waves in sonar.

transmitter

The magnitude of the maximum disturbance in the medium on either side of the mean value is called the ________ of the wave.

Amplitude

________ is a mechanical wave and needs a material medium like air, water, steel etc.

Sound

acronym SONAR

The ________ stands for SOund Navigation And Ranging.

A(n) ________ is a sound produced when sound waves are reflected off of a surface and returned to the listener.

echo

Light is a transverse wave but for light, the oscillations are not of the medium particles or their pressure or density

it is not a mechanical wave

Second is its SI unit (s).Frequency and time period are related as follows

F=1/T where F is frequency and T is time period