EXPLAINING WAVES ATTENUATION UNDERSTAND NATURE SIGNAL AUDIO By Sarbini, S.Pd (SMK Muhammadiyah 3 Yogyakarta)

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Presentation transcript:

EXPLAINING WAVES ATTENUATION UNDERSTAND NATURE SIGNAL AUDIO By Sarbini, S.Pd (SMK Muhammadiyah 3 Yogyakarta)

Teknologi dan Rekayasa ATTENUASI A.THE ATTENUATIONS Attenuation or attenuator is a series of functions / is revers with amplifier (weaken). Usefulness attenuator: a.Attenuation a signal b. Matching impedance

Teknologi dan Rekayasa B. TYPES OF ATTENUATIONS CIRCUIT 1.Attenuations L Type Type attenuasi the most simple types, namely L (voltage divider) Equation applies: Vout = i. R2 Vout = R2/(R1 + R2). Vin Jadi : Vout/Vin = R2/(R1 + R2) In the brace (amplifier), Vout / Vin is the (A) A = Vout /Vin

Teknologi dan Rekayasa  Attenuasi always weaken / reduce signal, then a price is always less than one.  Attenuasi is the opposite of the A dinotasikan with a. a = 1 / A = Vin / Vout Referred to a weakening A and expressed in a Decibel (db).

Teknologi dan Rekayasa 2. Resistans Characteristics from Attenuation Symmetrical Attenuation Symmetrical is two other types attenuasi (other than the type L: the type T and π) Attenuation can also be used as suitabling (matching) Impedance It is expected that this second type attenuasi can always follow the changes in the size of the output Impedance.

Teknologi dan Rekayasa Characteristics of a resistansi is attenuasi circumstances indicate that the price barriers enter (Rin) is the same as the price barrier load (RL). Attenuation in "Match"

Teknologi dan Rekayasa Table between Rin and RL  Price input resistancy depends on the price load resistancy(see adjacent table).  The size of the resistansi characteristics of a attenuasi is:  Rins = resistansi input when output short. Rino = resistansi input at the output open.

Teknologi dan Rekayasa 3. Analysis of symmetrical Attenuasi Type T  Comparison of R1 and R2 are as follows: m = R2/ R1 or R2 = m. R1

Teknologi dan Rekayasa  The amount of strengthening Simetris Attenuation tipe T with Ro load a = Vin/Vout

Teknologi dan Rekayasa Planning Attenuasi simertis with Ro = 50 Ohm

Teknologi dan Rekayasa 4. Attenuasi symmetrical Type  m is the comparison of R1 to R2, with the change to type T, the price obtained Ro: