TL with helmholtz @ closed end?

In stead of the standard ‘offset driver’ To kill that second pipe resonance?
(I’m just being a nerd-geek)

the 3000cm2(90 liters) @30 cm and 500cm2 42cm port (~50 hz in the green graph )

verses the 3000cm2 offset at (~1/3) 107cm in 300total.
1684977424105.png
 

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Last edited:
ID = 54.10

Comment = NEW RECORD - NEW RECORD - NEW RECORD - NEW RECORD - NEW RECORD - NEW RECORD

|RADIATION, SOURCE AND MOUTH PARAMETER VALUES:

Ang = 2.0 x Pi
Eg = 99.00
Rg = 0.00
Fta = 0.00

|HORN PARAMETER VALUES:

S1 = 3000.00
S2 = 3000.00
Par = 30.00
F12 = 0.00
S2S = 500.00
S3 = 500.00
Par = 41.00
F23 = 0.00
S3S = 3000.00
S4 = 3000.00
Par = 263.00
F34 = 0.00
S4S = 0.00
S5 = 0.00
L45 = 0.00
F45 = 0.00

|TRADITIONAL DRIVER PARAMETER VALUES:

Sd = 1680.00
Bl = 33.43
Cms = 4.88E-05
Rms = 14.56
Mmd = 467.35
Le = 1.50
Re = 3.40
OD1 = 2P

|ADVANCED DRIVER PARAMETER VALUES FOR SEMI-INDUCTANCE MODEL:

Re' = 0.00
Leb = 0.00
Le = 0.00
Ke = 0.00
Rss = 0.00

|ADVANCED DRIVER PARAMETER VALUES FOR FREQUENCY-DEPENDENT DAMPING MODEL:

Rms = 0.00
Ams = 0.00

|PASSIVE RADIATOR PARAMETER VALUE:

Added Mass = 0.00

|CHAMBER PARAMETER VALUES:

Vrc = 0.00
Lrc = 0.00
Ap = 0.00
Lpt = 0.00
Vtc = 0.00
Atc = 0.00

Acoustic Path Length = 0.0

|MAXIMUM SPL PARAMETER VALUES:

Pamp = 100
Vamp = 25
Iamp = 4
Pmax = 2000
Xmax = 15.0

Maximum SPL Setting = 3

|ABSORBENT FILLING MATERIAL PARAMETER VALUES:

Fr1 = 0.00
Fr2 = 0.00
Fr3 = 0.00
Fr4 = 0.00

Tal1 = 100
Tal2 = 100
Tal3 = 0
Tal4 = 1

|ACTIVE BAND PASS FILTER PARAMETER VALUES:

High Pass Frequency = 0
High Pass Slope = 1
Low Pass Frequency = 0
Low Pass Slope = 1

Butterworth High Pass Order = 1
Butterworth Low Pass Order = 1
Linkwitz-Riley High Pass Order = 2
Linkwitz-Riley Low Pass Order = 2
Bessel High Pass Order = 1
Bessel Low Pass Order = 1

2nd Order High Pass Q = 0.5
2nd Order Low Pass Q = 0.5
4th Order High Pass Q = 0.5
4th Order Low Pass Q = 0.5

Active Filter Alignment = 1
Active Filter On / Off Switch = 1

|PASSIVE FILTER PARAMETER VALUES:

Series / Parallel 1 = S
Series / Parallel 2 = S
Series / Parallel 3 = S
Series / Parallel 4 = S

|EQUALISER FILTER PARAMETER VALUES:

Band 1 Frequency = 0
Band 1 Q Factor = 0.01
Band 1 Gain = 0.0
Band 1 Type = -1
Band 2 Frequency = 0
Band 2 Q Factor = 0.01
Band 2 Gain = 0.0
Band 2 Type = -1
Band 3 Frequency = 0
Band 3 Q Factor = 0.01
Band 3 Gain = 0.0
Band 3 Type = -1
Band 4 Frequency = 0
Band 4 Q Factor = 0.01
Band 4 Gain = 0.0
Band 4 Type = -1
Band 5 Frequency = 0
Band 5 Q Factor = 0.01
Band 5 Gain = 0.0
Band 5 Type = -1
Band 6 Frequency = 0
Band 6 Q Factor = 0.01
Band 6 Gain = 0.0
Band 6 Type = -1

|STATUS FLAGS:

Auto Path Flag = 0
Lossy Inductance Model Flag = 1
Semi-Inductance Model Flag = 0
Damping Model Flag = 0
Closed Mouth Flag = 0
Continuous Flag = 0

|OTHER SETTINGS:

Filter Type Index = 0
Filter Input Index = 0
Filter Output Index = 0

Filter Type = 2

MEH Configuration = 0
ME Amplifier Polarity Value = 1
 
ID = 54.10

Comment = NEW RECORD - NEW RECORD - NEW RECORD - NEW RECORD - NEW RECORD - NEW RECORD

|RADIATION, SOURCE AND MOUTH PARAMETER VALUES:

Ang = 2.0 x Pi
Eg = 99.00
Rg = 0.00
Fta = 0.00

|HORN PARAMETER VALUES:

S1 = 3000.00
S2 = 3000.00
Par = 30.00
F12 = 0.00
S2S = 500.00
S3 = 500.00
Par = 41.00
F23 = 0.00
S3S = 3000.00
S4 = 3000.00
Par = 263.00
F34 = 0.00
S4S = 0.00
S5 = 0.00
L45 = 0.00
F45 = 0.00

|TRADITIONAL DRIVER PARAMETER VALUES:

Sd = 1680.00
Bl = 33.43
Cms = 4.88E-05
Rms = 14.56
Mmd = 467.35
Le = 1.50
Re = 3.40
OD1 = 2P

|ADVANCED DRIVER PARAMETER VALUES FOR SEMI-INDUCTANCE MODEL:

Re' = 0.00
Leb = 0.00
Le = 0.00
Ke = 0.00
Rss = 0.00

|ADVANCED DRIVER PARAMETER VALUES FOR FREQUENCY-DEPENDENT DAMPING MODEL:

Rms = 0.00
Ams = 0.00

|PASSIVE RADIATOR PARAMETER VALUE:

Added Mass = 0.00

|CHAMBER PARAMETER VALUES:

Vrc = 0.00
Lrc = 0.00
Ap = 0.00
Lpt = 0.00
Vtc = 0.00
Atc = 0.00

Acoustic Path Length = 0.0

|MAXIMUM SPL PARAMETER VALUES:

Pamp = 100
Vamp = 25
Iamp = 4
Pmax = 2000
Xmax = 15.0

Maximum SPL Setting = 3

|ABSORBENT FILLING MATERIAL PARAMETER VALUES:

Fr1 = 0.00
Fr2 = 0.00
Fr3 = 0.00
Fr4 = 0.00

Tal1 = 100
Tal2 = 100
Tal3 = 0
Tal4 = 1

|ACTIVE BAND PASS FILTER PARAMETER VALUES:

High Pass Frequency = 0
High Pass Slope = 1
Low Pass Frequency = 0
Low Pass Slope = 1

Butterworth High Pass Order = 1
Butterworth Low Pass Order = 1
Linkwitz-Riley High Pass Order = 2
Linkwitz-Riley Low Pass Order = 2
Bessel High Pass Order = 1
Bessel Low Pass Order = 1

2nd Order High Pass Q = 0.5
2nd Order Low Pass Q = 0.5
4th Order High Pass Q = 0.5
4th Order Low Pass Q = 0.5

Active Filter Alignment = 1
Active Filter On / Off Switch = 1

|PASSIVE FILTER PARAMETER VALUES:

Series / Parallel 1 = S
Series / Parallel 2 = S
Series / Parallel 3 = S
Series / Parallel 4 = S

|EQUALISER FILTER PARAMETER VALUES:

Band 1 Frequency = 0
Band 1 Q Factor = 0.01
Band 1 Gain = 0.0
Band 1 Type = -1
Band 2 Frequency = 0
Band 2 Q Factor = 0.01
Band 2 Gain = 0.0
Band 2 Type = -1
Band 3 Frequency = 0
Band 3 Q Factor = 0.01
Band 3 Gain = 0.0
Band 3 Type = -1
Band 4 Frequency = 0
Band 4 Q Factor = 0.01
Band 4 Gain = 0.0
Band 4 Type = -1
Band 5 Frequency = 0
Band 5 Q Factor = 0.01
Band 5 Gain = 0.0
Band 5 Type = -1
Band 6 Frequency = 0
Band 6 Q Factor = 0.01
Band 6 Gain = 0.0
Band 6 Type = -1

|STATUS FLAGS:

Auto Path Flag = 0
Lossy Inductance Model Flag = 1
Semi-Inductance Model Flag = 0
Damping Model Flag = 0
Closed Mouth Flag = 0
Continuous Flag = 0

|OTHER SETTINGS:

Filter Type Index = 0
Filter Input Index = 0
Filter Output Index = 0

Filter Type = 2

MEH Configuration = 0
ME Amplifier Polarity Value = 1