Noise can be defined as?

When sound wave travels from air into the human body, what happens to its speed?

What property of blood is characterized by the Reynolds number?

What are the SI units for loudness?

Sound frequency is?

Sound amplification in the outer ear (auditory canal) is affected by?

Ultrasound waves propagate through human tissue as:

dness If the period of a wave is 0.02 s, what is its frequency? (​Hint: how often does it vibrate in one second?)

Infrasound of certain frequency and intensity can:

What is the meaning of 0 dB?

At what angle (Θ) to the surface of the body should the ultrasonic probe be applied in order to gain a maximum Doppler shift? Consider that Doppler shift is proportional to cos (Θ).

Can humans sense infrasound waves?

Doppler frequency (shift) is:

Pulse pressure is defined as:

The direct piezoelectric effect is used for:

Phonophoresis is:

The audiogram is a method for hearing loss evaluation by measuring the threshold hearing intensity of sound for different:

Which of the following waves are NOT mechanical?

The volumetric flow rate ​Q =dV/dt ​of blood in the cardiovascular system is:

What is the predominant type of blood follow in the arteries of a healthy person?

When blood pressure is measured with a stethoscope, at what point is the systolic pressure detected?

Does absorption of sound and the corresponding penetration depth depend on the wavelength?

Gas embolism (clogging of blood vessel) can be explained with:

Doppler shift is defined as:

In what form is the information received with Doppler Echography displayed?

Damping oscillations are?

Prolonged exposure to loud noise can cause permanent damage to?

A propagating sound wave transfers?

Which statement is correct?

Is it possible to tell the direction of motion of erythrocytes from the sign of the Doppler shift ​∆f = f - f​0?

Mechanical waves used for destruction of kidney stones, in procedure called “lithotripsy”, cause minimal damage to surrounding tissues because:

Where in the cardiovascular system is the blood pressure at minimum?

Ultrasound can propagate through:

Which natural science studies infrasound?

The resonant frequency of the vestibular system is in the range of:

Which of the following properties of sound is measured in Hertz (Hz)?

The so called “reverse piezoelectric effect” finds application in:

Does human tissue exhibit piezoelectric properties?

The speed of sound is calculated by the Newton-Laplace formula , where K is the stiffness coefficient, and ρ is the density of the material. If the density of the substance doubles, the speed of propagating sound wave will?

Human ear is most sensitive to frequencies (refer to equal-loudness curve):

Which of the following parameters is the most informative for the blood supply of a given organ?

Is it possible for internal organs to generate sounds that propagate to the skin, and are audible?

What units are used to measure blood pressure with aneroid manometer?

Ideal liquids are defined as:

Timbre is related to:

Cardiac resonant frequency in the range of:

Which of the following is used in Doppler echography?

Which of the following formulas relates volumetric flow rate ​Q t​ o linear speed ​v and surface area ​S o​ f a fluid in a closed circuit (blood)?

If shorter wavelengths of ultrasound are less penetrating in human tissue, then which of the following frequencies is most appropriate for DEEP tissue and organ imaging?

The pitch of sound depends mostly on:

Why can’t we hear voices (speech) when submerged under water?

What property of sound is measured in decibels (dB)?

The speed of sound (in non-dispersive medium):

The speed of ultrasound in human tissue depends on:

Laplace pressure ​Δр ​does NOT depend on:

Infrasound CANNOT propagate through:

Ideal (perfect) fluid is defined as:

When sound wave travels across two materials with similar acoustic impedance, at the boundary surface there will be:

When blood pressure is measured with a stethoscope, at what point is the diastolic pressure detected?

Intensity is defined as?

The acoustic impedance ​Z o​ f a substance is defined as the product of:

A necessary condition for internal friction (viscous force) in fluid dynamics is:

Pure tone is characterized by:

What is the most precise definition of blood pressure?

If the amplitude of a wave doubles (x2), what would happen to the period?

The speed of sound in the human body is approximately:

Linear velocity of blood in the cardiovascular system is:

Choose the correct range:

7. The sound intensity level in a room is 20 dB. A TV produces additional intensity level of 60 dB. What is the sound intensity in the room now?

Which of the following factors has the most significant effect on the speed of propagation of sound waves?

The human ear is sensitive to frequencies in the range:

The loss of elasticity (stiffening) of the tympanic membrane will result in?

When sound wave propagates between two media with similar impedance, there will be:

If ​Δf i​ s the change in frequency between emitted and received ultrasound signals due to Doppler effect during measurement of the linear speed of blood, then:

The resonant frequency of the internal organs is in the range of:

Choose the correct statement:

Mechanical waves with frequency above 20 kHz are called:

The fundamental harmonic (frequency ​f0​ )​ in a complex sound is characterized by?

Weber-Fechner law (in psychophysics) describes a logarithmic relationship between the intensity of a sound wave and....:

What is the speed of sound in air?

Infrasound is:

Match the physical (objective) with the corresponding psychophysical (subjective) properties of the sound: ​(hint: multiple connections are possible) a. Frequency. a)Timbre b. Intensity. b)Pitch c. Acoustic spectrum. c) loudness

A person screams in the mountain and hears the echo after 2 seconds. How far was the cliff that caused the reflection of the sound (echo)?

Which of the following does NOT have relevance to the reflection/transmission of sound waves?

The speed of arterial pulse wave depends mostly on:

Which of the following parameters of the vascular system have the greatest effect on blood flow resistance?

The contact gel used in ultrasonography (echography) is for:

Which of the following waves cannot propagate in vacuum?

In medical imaging, Doppler echography is most appropriate for:

What is the variation of blood pressure across the cardio-vascular system:

Doppler shift applies to:

Piezoelectric effect is defined as:

Sound Waves are?

In which of the following mediums, sound waves cannot propagate?

What quantity is transferred when there is internal friction?

For which of the following numerical Doppler frequency shifts is the blood speed the highest?

Sound Intensity Level is proportional to the logarithm of the ratio of incoming to threshold intensity SIL ​= 10·Log (I/I​0)​ . ​If intensity is increased by a factor of 100, what is change in SIL?

What causes the Korotkoff sounds?

Blood pressure on the walls of blood vessels is compensated (counterbalanced) by the elasticity of blood vessels, and by the air pressure. If the reading of the sphygmomanometer during a systole is 120 mmHg and air pressure is 760 mmHg, what is the actual pressure that blood exerts on the walls of arteries?

Timbre is: