EAW Resolution Spezifikationen PDF herunterladen (Seite 28)

EAW Smaart 6 Operation Manual Concepts, Glossary, and Bibliography

28

Choosing a Noise Source

The distinction between pink and white noise is not important in Frequency Response

measurements. The transfer function compares the two input signals over a given fre-

quency range point-by-point. This is a concern when looking at a single channel RTA

noise measurement. If it appears flat in narrow band resolution, it is white. If it appears

to be slopping down to the right on narrow band resolution (loss at high frequencies) it

may be pink.

NOTE: White noise is often used to test electronic components but has so much high

frequency energy that it can easily damage loudspeakers if played at high lev-

els. For this reason we DO NOT recommend using white noise as a test signal

for sound system measurement applications.

2.1.7 Data Window Functions

Data window functions are commonly used to reduce truncation errors that arise from

segmenting random signals into FFT-size chunks. The FFT is a circular function that

assumes the signal segment being transformed is infinitely repeating. Therefore, dis-

continuities between the data near the beginning and end of the time domain data series

can result in an excessively high noise component and leakage of data at all frequencies

into neighboring frequency bins when the FFT of the signal is taken.

Data window functions help alleviate this problem by attenuating the samples nearest

the beginning and end of the time record being transformed before the FFT is performed.

Although this technique can dramatically reduce the impact of discontinuities, there are

several trade-offs involved in determining the precise shape of the attenuation curve. A

number of data window functions, with various strengths and weaknesses, have been

developed over the years. For most audio applications, window functions with Gauss-

ian tapers work best. We recommend using the default Hanning window (also called

a Hann window) unless you have a specific reason to use a different type.

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Philips BDP7500SL/12 Manual de usuario (33 paginas)

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CZ Návod k použití

1

ESKÁ REPUBLIKA

3

1 Důležité

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2 Tento výrobek

5

Popis přístroje

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7

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10

4 Začínáme

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5 Přehrávání

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15

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6 Nastavení

17

Audio Setup (Nastavení zvuku)

18

Preference Setup

19

(Nastavení předvoleb)

19

EasyLink Setup

20

(Nastavení EasyLink)

20

7 Další informace

21

Technické údaje

22

8 Řešení potíží

23

9 Slovníček pojmů

24

Open Source Software

26

UPOZORNĚNÍ

30

BDP7500_05_UM_V2.1_931

33

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Návod na obsluhu

1

1 Dôležité

4

Ochranné známky

5

2 Vaše zariadenie

6

Pohľad na zariadenie

7

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8

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9

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10

Vedenie zvuku do ostatných

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12

4 Začíname

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Nastavenie siete

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Použitie Philips EasyLink

14

5 Prehrávanie

15

Prehrávanie hudby

18

Prehliadanie fotograﬁí

18

Prehrávanie z USB zariadenia

19

6 Úprava

20

Speaker Setup

21

Nastavenia preferencií

22

Rozšírené nastavenia

24

7 Dodatočné

25

Technické údaje

26

8 Odstránenie

27

9 Slovník

28

Všetky práva vyhradené

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БГ Ръководство на потребителя

1

Съдържание

3

Бъдете отговорни

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Уважавайте авторските права

4

2 Вашият продукт

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Дисплей

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Remote control

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15

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Audio Setup

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BDP 7500

1

ATSARGIAI:

2

PASTABOS

3

1. SVARBU

4

... TERMINØÞODYNAS

4

1 KLASË LAZERINIS

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PRODUKTAS

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8. PROBLEMØ SPRENDIMAS

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7. PAPILDOMA INFORMACIJA

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3. PRIJUNKITE

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... PAREGULIUOKITE NUSTATYMUS

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... PRIJUNKITE

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4. NUO KO PRADËTI

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... NUO KO PRADËTI

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6. PAREGULIUOKITE NUSTATYMUS

15

5. GROKITE

16

... GROKITE

16

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