吉它的概略,为啥您的歌声和你听到的不平等

日期:2019-05-17编辑作者:35222.com

The voice in your head is a lie. What you hear when you open your mouth is distinctly less velvety than what everyone around hears—and it's your skull that's to blame.More specifically, it's the way your skull vibrates。我们脑海中的声息是叁个谎话,当您谈话时,你听到的响动比不上相近人听到的那么温文儒雅,而那全部都要怪罪于您的头骨。更恰本地说,是你头骨震惊的情势。

DAY 20   2017-02-07 Tue

Note:

Your voice emanates from from the lower portion of your throat, as expelled air from the lungs passes across your vocal chords, which vibrate to generate sound. This sound is then amplified by your voice box, modulated

本文基础:特德-ed录像

pluck a string—standing wave(驻波)—nodes(still)/anti-nodes(oscillate)—the vibration translates through the neck and bridge to the guitar’s body—wood vibrates—air molecules jostled – creating sound

into words by your tongue and lips, and reverberated through the surrounding atmosphere until it enters your listener's ear canal to stimulate their eardrums and structures within the inner ear—which then convert the analog waveform to electrical impulses that the brain can understand。大家的音响来源喉咙的底下,从肺部呼出的气体经过声带振动发声,接下去通过喉头放大,经由舌头和嘴唇协会成句,经由周围空气传到进入听者的耳道,激情鼓膜和内2结构,从而将效仿波形转化为大脑能清楚的电脉冲。

图片 1

Pitch: decided by frequency—frequency decided by four factors: length, tension, density and thickness – the thicker, the slower, the lower

However, the inner ear doesn't just pick up sound from external sources. Vibrations emanating from within your body can activate these auditory structures as well. And when you speak, the rapid fluttering of your vocal chords actually causes your entire braincase to vibrate."When you speak, the vocal folds in your throat vibrate, which causes your skin, skull and oral cavities to also vibrate, and we perceive this as sound," Ben Hornsby, a professor of audiology at Vanderbilt University said.但是,内耳不唯有负担从外部遭遇中募集声音。由身体内爆发的音响一样可以打动该协会。当您讲讲的时候,声带的全速振动拉动脑壳振动。“当您谈话的时候,喉咙中发声会招致您的皮层、头骨和口腔共鸣,由此大家收获了平常意义上的鸣响。”范德堡大学听力学讲解本·霍恩斯比解释说。

from internet

Several standing waves:

But sound doesn't travel through bone nearly as easily as it does through air. This added resistance causes the waveform frequency to drop, lowering the pitch of the sound you hear internally and creating a sort of feedback effect that stimulates the eardrum from both sides. This effect is heightened by the fact that you really can't hear your own voice directly. Because your ears are positioned behind your mouth, the sounds coming out of your mouth must first bounce off objects and back into your ears. This too causes the waveform to lose energy as well as, in turn, frequency and pitch, resulting in you hearing a distorted, lower tone than what people hear directly from out of your mouth。不过动静通过骨头的经过远不比在氛围中流传顺畅。声波降调的大概性扩大,并且随着鼓膜双次振动带来的举报效应,音高也会随着下跌。由此,大家并不可能真正直接听到本身的声响。由于耳朵位于嘴巴之后,从口中发出的音响自然先弹到某样物体上随着再盛传耳朵。那无差距使声波能量骤降,随之拉动音调养音高的下挫,使得大家自个儿听到的动静远低于周围凡直接听到的动静。

终极誊写版:

the first fundamental wave decides the pitch

"You hear your voice in stereo,"迈克尔 凯利 said."While other people just hear it in mono."That's why you may think you sound like James Earl Jones in your head but end upsounding like Steve Urkel on tape. “你听到的温馨的音响是立体声,”迈克尔·凯雷说道,“而别的人听到的只是单声道。”那就很好的解释了你听着和煦的响动像James·厄尔·Jones,实际录下来再听就全盘是另一人了。

434 words, 1 hour

overtones: changed by the way you pluck the string—in the middle:fundamental waves and odd overtones/near the bridge: even multiple overtones

(沪江匈牙利(Magyarország)语)

How does a pluck on the guitar string make a melody at last? The scientific basics behind this conjure is sound waves.

图片 2

This physic process starts from the vibration the string makes when plucked. The vibration is called a "standing wave". The fixed points ("node") and the rest of the oscillating points ("anti-nodes") on a string produce this vibration, which is then transported through the guitar neck and bridge to its body, a thin flexible wood. This standing wave keeps jostling the surrounding air molecules together and apart, together and apart, resulting in a sequential compression, i.e. sound waves, which the ears translate into electric impulses before human brain ultimately perceive as sound.

Gui-----taaaaar!!

How is a pitch controlled so that a guitarist plays in tune?

We can hear the world because our brain translates vibrations in the air into electric signals which we recognize as sounds. The same rule applies to the sound of the guitar. When you pluck a string, you actually create a series of standing waves, with nodes, those points that stand still and anti-nodes, those that oscillate back and forth. The vibration then translates through the neck and bridge to the guitar’s body and reaches the thin and flexible wood. Most of it escapes from the hole in the wood and reaches our ear, thus creating sound.

A sound pitch is determined by the frequency of the compression: the more quickly the string vibrates, the more frequent the compressions, the higher the pitch. (Quicker vibrations produces higher pitch with more frequent compressions) And in order to know how the frequency of your string stands at, you need to know its length, tension, density and thickness, the latter two being the ultimate determinants which vary from guitar to guitar. In principle, thicker string will produce lower pitch because it vibrates more slowly.

We hear notes of different pitches because the vibrations bear various frequencies. Frequency is decided by four factors, length, tension, density and thickness. While the strings are the same in length and tension, density and thickness varies to create different pitches. The thicker the string, the slower the vibration, thus producing a note with a lower pitch.

To render a melody, getting the pitch right is not enough. While the pitch makes the final product of sound waves in tune, it is the overtone that gives a note its richness, making possible the melodious final product. One pluck at the string actually produces several waves, one fundamental wave and many overtones, the latter with a greater frequency. And where you pluck the string affects what overtones you get: odd multiple-overtones in the middle and even multiple-overtones near the bridge with a twangier sound.

The fret space of the guitar is decided by frequency of each note. The western scale is based on the overtone theories of a vibrating string. When one note has the frequency exactly twice of another, they sound similar to us and we call the difference between them an octave, and squeeze the rest of the notes in between. Each of the twelve half steps has the frequency 2^12 higher than its previous one, which determines the fret space of the guitar.

In fact, this overtone series is the basis of western scale, which fills an octave (2 notes, one being twice the frequency of the other) with 12 half steps, each 2^1/12 more frequent than the previous one——exactly how the fret spacing on the guitar body is arranged: each fret being 2^1/12 more frequent than the previous one. Therefore, fretless instrument such as violin is difficult to control the pitch but more flexible to produce an infinite array of overtones (with different frequency).

Though the major parts of the guitar remain the same, shape and material  can be changed to produce sounds with a unique quality.

New wave patterns can be created when two or more strings are played at the same time to produce chords or beats and more sound effects such as distortion, “wah-wah”, delay, flanger can be formed through the electrical processing between a pick-up and a speaker.

These are within human being’s ability. But imagine this. What if we have an infinite series of very tiny yet harmonic strings all mysteriously perfectly “manipulated” by an invisible hand of a higher being? Is that how everything is created in the universe?

图片 3

String theory? (fr: internet)

图片 4

from internet


初稿:341 words, 30 minutes

How does a pluck on the guitar string make a melody at last? It's all about sound waves.

This physics process starts from the vibration the string makes when you pluck a string. This vibration is called a "standing wave". The fixed points ("node") and the rest of the oscillating points ("anti-nodes") on a string produce this vibration, which is then transported through the guitar neck and bridge to its body, a thin flexible wood. This standing wave keeps jostling the surrounding air molecules together and apart, together and apart, resulting in a sequential compression, i.e. sound waves, which the ears translate into electric impulses before human brain ultimately perceive as sound.

How is a pitch controlled so that a guitar produces organised melodious sound instead of a jumble of unpleasant noise?

A sound pitch is determined by the frequency of the compression: the more quickly the string vibrates, the more frequent the compressions, the higher the pitch. (Quicker vibrations produces higher pitch with more frequent compressions) And in order to know how the frequency of your string stands at, you need to know its length, tension, density and thickness, the latter two being the ultimate determinants which vary from guitar to guitar. In principle, thicker string will produce lower pitch because it vibrates more slowly.

While the pitch makes the final product of sound waves intune, it is the overtone that gives a note its richness. One pluck at the string actually produces several waves, one fundamental wave and many overtones, the latter with a greater frequency. And where you pluck the string affects how the overtones render: odd multiple overtones in the middle and even multiple overtones near the bridge which produces a twangier sound.

In fact, this overtone series is the basis for western scale, which fills an octave (2 notes, one being the exact 2 times of the other in frequency)

But the pitch is not the only thing that ensures the product of a melody, which is formed through different notes in a scale. A scale is

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