forumpoweraudio.ro

cand se vor pune poze cu el

pe sambata probabil

uppp

nu inteleg cu ce va ajuta pozele



ce trebuie mai mult?

ca sa ne incante ochiul cand iti iei spre exemplu o pereche de adidasi, nu te uiti la ei mai intai ?
Pozele ajuta sa vezi calitatea constructiei, masivitate, elemente constructive, etc.

II fain da are qts mare.

Si ?

ce reprezinta factorul Q.. ce indica mai exact? ca eu.... nu stiu

This group of parameters outlined by A.N. Thiele, and later by R.H. Small, describe the electrical and mechanical characteristics of mid and low frequency loudspeakers operating in their pistonic region. These parameters are crucial for designing quality enclosures for sound quality or loudness.

Theile-Small Parameters


B Magnetic flux density in gap, in Tesla-meters (TM)

BL The magnetic strength of the motor structure.

C Propagation velocity of sound at STP, approx. 342 m/s

Cas Acoustical equivalent of Cms

Cmes The electrical capacitive equivalent of Mms, in farads

Cms The driver's mechanical compliance (reciprocal of stiffness), in m/N

D Effective diameter of driver, in meters

F3 -3 dB cutoff frequency, in Hz

Fb Enclosure resonance (usually for bass reflex systems), in Hz

Fc System resonance (usually for sealed box systems), in Hz

Fs Driver free air resonance, in Hz. This is the point at which driver impedance is maximum.

L length of wire immersed in magnetic field, in meters

Lces The electrical inductive equivalent of Cms, in henries

L Length of wire immersed in magnetic field, in meters

Ms The total moving mass of the loudspeaker cone.

Mmd Diaphram mass, in grams

Mms The driver's effective mechanical mass (including air load), in kg

n0 The reference efficiency of the system (eta sub 0)
dimensionless, usually expressed as %

p (rho) Density of air at STP 1.18 kg/m^3

Pa Acoustical power

Pe Electrical power

Q The relative damping of a loudspeaker

Qa The system's Q at Fb, due to absorption losses; dimensionless

Qec The system's Q at resonance (Fc), due to electrical losses; dimensionless

Qes The driver's Q at resonance (Fs), due to electrical losses; dimensionless

Ql The system's Q at Fb, due to leakage losses; dimensionless

Qmc The system's Q at resonance (Fc), due to mechanical losses; dimensionless

Qms The driver's Q at resonance (Fs), due to mechanical losses; dimensionless

Qp The system's Q at Fb, due to port losses (turbulence, viscousity, etc.); dimensionless

Qtc The system's Q at resonance (Fc), due to all losses; dimensionless

Qts The driver's Q at resonance (Fs), due to all losses; dimensionless

R Ripple, in dB

Ras Acoustical equivalent of Rms

Res The electrical resistive equivalent of Rms, in ohms
Revc DC voice coil resistance, in ohms

Rg Amplifier source resistance (includes leads, crossover, etc.), in ohms

Rms The driver's mechanical losses, in kg/s

Sd Effective piston radiating area of driver, in square meters

SPLo Sound Pressure Level, usually measured at 1 watt, at 1 meter in front of the loudspeaker

Vas "Equivalent volume of compliance", this is a volume of air whose compliance is the same as a driver's
acoustical compliance Cms (q.v.), in cubic meters

Vd Maximum linear volume of displacement of the driver (product of Sd times Xmax), in cubic meters.

Xmax Maximum peak linear excursion of driver, in milimeters

o explicatie mai pe larg aici:

http://www.the12volt.com/caraudio/thiele.asp

senq very much