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What is double blind randomized controlled trial?

A double blind study is a randomize ...
dmarko 發表於 2020-11-16 02:39

如果要關於聲學的科學數據，可以去國際音頻工程學會睇。大量關於雙盲聽測試的實驗，都證明人類會因為品牌或價錢甚至其他引導提示而影響聲音評價，這種主觀性讓人類無法對聲音作出正確評價，例如一款知名品牌的高價產品放在眼前，測試者會給予非常好的評價，相反如果測試者在不知道的情況下，對同一款產品的評價卻是反差了很多。

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pallee

double blind
測試者和被試者都唔知試緊乜。藉這種方法消除主觀,達至完全客觀。
也可加添些混亂性(如重復雙盲),去印證結果的客觀性。

IanW

唔科學的"e科生"又重出肛湖了....

一般音響籠統所謂的"力"係指 current.... 尤其係指低音.
實際由電經線圈磁場推動喇叭/耳機的振膜, "大聲"的低音對連續 current 的需求大... 唔係出倒乜野"大聲"就叫夠"力".
高音可以推到好吵耳, 但低音可能係軟棉棉.

pallee

Guys emphasize ears too much.

Human listens by brain. Ears are reception tool only. Other reception tools include skin, bone, eyes(yes, due to color effect), body(ears cannot receive 20Hz or lower, body can).

In fact, ears are not an excellent reception tool (in terms of frequency range, sensitivity, loudness). Human ears are much inferior than dog ears. Precise electronic equipment "listen" much more and better than human ears.

As human uses brain to listen, listening experience is more important in Hi Fi. Emotion, past experience, brand recognition, product outlook affect listening experience.

hk133

我唔知, 我看唔到
dmarko 發表於 2020-11-15 01:19

    你po荷蘭叻張相，似係話緊你自己

cocteau

kph30i正野，我仲有2盒係到看門口
Dcup 發表於 2020-11-16 09:44

看門口、送禮，所以我先唔怕收多幾對。

cocteau

業內人仕做乜要直抄google一段野？
ok 我又當你好熟placebo係乜野，咁你應該好明我之前講既麵粉丸唔係醫病而係對照，做乜傻下傻下咁講食麵粉醫病。

凡是敵人擁護的, 我們都必須反對。＜－－－簡直就係唔科學、反智到鄉下婆既級別。

Leonbro

回覆 75# pallee


    每次有深層次問題，pallee 師兄都有精僻見解或知識。真心欣賞同感謝！

cocteau

(ears cannot receive 20Hz or lower, body can)
pallee 發表於 2020-11-16 12:30

ching有料。

不過耳仔其實係“聽到“  20Hz既。
同body一樣，耳膜一樣係有觸感（所以會痛）。只要低頻到達耳膜時個 impluse 仍然夠強（所以headphone先做到，speaker唔得），耳膜一樣可以好似你個心口咁“feel“ 到震。