Archivio dell'autore: sasachess

Wood Rook

In anteprima assoluta le Wood Rook

Sarà il mio prossimo progetto: 2 vie bass reflex in configurazione D’Appolito.

 

Continua qui.

RightMark Audio Analyzer: Test M-Audio Transit

Testing device Transit USB Out 1/2
Sampling mode 16-bit, 48 kHz
Interface MME
Testing chain External loopback (line-out – line-in)
RMAA Version 6.2.3
20 Hz – 20 kHz filter ON
Normalize amplitude ON
Level change -5.6 dB / -5.6 dB
Mono mode OFF
Calibration singal, Hz 1000
Polarity correct/correct

 

Summary

Frequency response (from 40 Hz to 15 kHz), dB
+0.03, -0.01
Excellent
Noise level, dB (A)
-92.0
Very good
Dynamic range, dB (A)
92.1
Very good
THD, %
0.0015
Excellent
THD + Noise, dB (A)
-85.4
Good
IMD + Noise, %
0.0075
Excellent
Stereo crosstalk, dB
-91.8
Excellent
IMD at 10 kHz, %
0.0076
Excellent
General performance
Excellent

 

Frequency response

From 20 Hz to 20 kHz, dB
-0.06, +0.03
From 40 Hz to 15 kHz, dB
-0.01, +0.03

 

Noise level

Left
Right
RMS power, dB
-90.7
-90.8
RMS power (A-weighted), dB
-91.9
-92.1
Peak level, dB FS
-76.8
-76.7
DC offset, %
-0.0
-0.0

 

Dynamic range

Left
Right
Dynamic range, dB
+90.8
+90.7
Dynamic range (A-weighted), dB
+92.1
+92.0
DC offset, %
-0.00
-0.00

 

THD + Noise (at -3 dB FS)

Left
Right
THD, %
+0.0012
+0.0018
THD + Noise, %
+0.0060
+0.0061
THD + Noise (A-weighted), %
+0.0053
+0.0054

 

Intermodulation distortion

Left
Right
IMD + Noise, %
+0.0074
+0.0075
IMD + Noise (A-weighted), %
+0.0064
+0.0063

 

Stereo crosstalk

Left
Right
Crosstalk at 100 Hz, dB
-91
-90
Crosstalk at 1000 Hz, dB
-90
-92
Crosstalk at 10000 Hz, dB
-79
-78

 

IMD (swept tones)

Left
Right
IMD + Noise at 5000 Hz,
0.0077
0.0076
IMD + Noise at 10000 Hz,
0.0075
0.0076
IMD + Noise at 15000 Hz,
0.0074
0.0075

Sound Level Calibrator

Il calibratore che avevo ordinato è arrivato!

Ecco il giocattolino, non vedo l’ora di usarlo! Party

sc-05

Caratteristiche:

This is a brand new CEM SC-05 industrial sound level meter calibrator. This device is designed to calibrate sound meters with 1/2″ microphone. This calibrator complies with IEC 942 Class 2 standard. Its compact size makes the device very easy to carry and handle. Ideally, the sound meter should be calibrated once a year.

FEATURES

* Dual sound pressure outputs at 94dB and 114dB which can be selected by a switch.
* Operates on a single 9V battery.
* Auto sound off on low battery to ensure accurate performance.

SPECIFICATIONS

* Output sound pressure levels: 114 dB and 94 dB
* Output frequency: 1000Hz +/- 4%
* Reference conditions: temperature at 23 deg C (73 deg F); Air pressure at 1013 mbar; Humidity at 65%RH
* Accuracy: +/- 0.5 dB
* Power: 9V battery
* Compliance: IEC 942 Class2
* Dimensions: 120 (L) x 51 (W) x 43 (H) mm
* Weight: approx. 130g

Il mio Blog

Benvenuti nel mio nuovo Blog!

L’idea è di condividere in questo spazio idee, informazioni, miei progetti e realizzazioni, per gli appassionati costruttori di diffusori acustici di qualità.

Anche se il  “taglio” del Blog farà sorridere i progettisti più smaliziati, il linguaggio è semplice ed il fine è quello di aiutare chi si trova per la prima volta ad affrontare questi temi.

Fortunatamente per me è la seconda! 🙂