Abeka 9th Science Test 5 p1 L72

What is the result when two notes interfere harmoniously?

• Noise
• Consonance
• Silence
• Dissonance

What technique uses the reflection of sound to calculate distance?

• Echo ranging

• Ultrasonic imaging
• Radar
• Sonar

Which of the following properties is directly proportional to wave speed?

• Amplitude

• Wavelength

• Frequency

• Intensity

What is the effect of intensity on the way the human ear perceives sound?

• Frequency

• Pitch

• Loudness

• Wavelength

What is the reinforcement or cancellation that occurs when two or more sound waves meet?

• Resonance
• Echo
• Dissonance
• Interference

What is the substance through which a wave transfers its energy?

• Wave
• Frequency
• Amplitude
• Medium

What term refers to sound that has too low a frequency to be heard?

• Infrasonic

• Resonance
• Echo
• Ultrasound

What term describes a situation in which a driving frequency on an object is the same as or nearly the same as one of the object's natural frequencies?

• Oscillation
• Vibration
• Resonance
• Damping

Which of the following describes the frequency relationships between a fundamental and its overtones?

• Timbre

• Pitch

• Harmonic series

• Interval

What is a musical instrument's distinctive sound quality?

• Melody
• Rhythm
• Pitch
• Timbre