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What are the basic preconditions for periodic motion?
周期性运动的基本前提条件是什么？
How is a traveling wave initiated? What are the minimum
conditions for producing a traveling wave?
怎样产生行波？产生行波的最小条件是什么？
What is sound?
什么是声音？
What things must be measured to describe periodic motion?
...traveling waves?
要描述周期性运动，必须测量哪些量？……行波？
What is the relation between wave velocity,
frequency, and wavelength?
波速、频率和波长之间有什么关系？
Describe and give examples of the four basic wave phenomena:
- Reflection
反射
- Interference
干涉
- Refraction
折射
- Diffraction
衍射
描述并举例说明四种基本的波现象：
What determines the velocity of a traveling wave ?
什么决定了波的传播速度？
Does the speed of sound in air depend upon sound pitch?
upon sound loudness?
声音在空气中的速度是否取决于声音的音调？是否取决于声音的响度？
How are "beats" produced? What is a "subjective tone"?
‘拍’现象是如何产生的？‘主观音调’是什么？
How does sound wave description compare to the
description of radio waves?
声波的描述与无线电波的描述有何不同？
What is resonance? What is a standing wave?
What are the wavelength conditions for resonance
for a stretched string, an open cylindrical air
column,a closed cylindrical air column?
什么条件下的波长会引发弦的共振、开放圆柱形气柱的共振和封闭圆柱形气柱的共振？
Describe the physical properties of the sound
which are being detected by the human ear when
it perceives pitch, loudness, and quality of sound.
描述当人耳感知音调、响度和音色时，被检测到的声波的物理特性。
Distinguish between longitutional and transverse
waves. Which characterizes sound in air? Under
what conditions can both types of waves occur?
区分纵波和横波。声音在空气中由哪种波来表征？在什么条件下这两种波都可以存在？
General Wave Properties
- 1. reflection
反射
- 2. interference
干涉
- 3. refraction
折射
- 4. diffraction
衍射
波的普遍性质 |
Characteristics of Audible Sound
- 1. pitch = frequency
音调 = 频率
- 2. loudness related to intensity, sensitivity
响度与强度、灵敏度有关
- 3. quality (timbre)
3. 质量（音色）
可听声音的特性 |
What do you measure when you detect pitch?
当你检测音调时，你测量什么？
How does the human ear detect pitch?
人类耳朵如何检测音调？
What is the difference between sound intensity and loudness?
声音强度和响度有什么区别？
What is measured by decibels?
分贝测量的是什么？
How can the ear mechanism distinquish between vowel sounds?
耳朵机制如何区分元音声音？
Georgia QCC, Grade 6 Standards
佐治亚州第六年级标准
什么是共振？什么是驻波？ |