PINK NOISE / WHITE NOISE GENERATORS A pink or white noise generator is an essential tool for running many tests on sound systems and their components. Adjustment of equipment drive levels must be made external to the generator. White noise has an equal amount of energy per Hz of bandwidth. For example, there would be equal energy from 20Hz to 21Hz as there would be from 20,000Hz to 20,001Hz. This characteristic is most useful with what are called constant Hz-bandwidth analyzers, which most swept-spectrum analyzers are. White noise is easily shaped or filtered to make pink noise that has equal energy per octave of bandwidth (or in each fraction of an octave). For example, there is equal energy in the octave centered at 125Hz and in the octave at 2kHz, or any other within the limits of the generator. Because of this, pink noise produces a flat response in constant-percentage bandwidth analyzers such as the Gold Line analyzers and other RTAs (real time analyzers). The spectrum of pink noise also approximates that of much music with less power per Hz (- 3dB/octave) with increasing frequency. This makes it an excellent test signal for sound systems, where white noise could burn out tweeters. At lower levels, white noise can be used for critical listening checks and some other tests, but pink noise is much more useful, in general. Noise Generators available from Gold Line are the PN2 – Pink Noise Only; PN2W – Pink and White Noise; the PN3A – Pink Noise Only with Burst or Pulse for RT60 or Loudspeaker Timing; The PN3B – Pink Noise Only or 1kHz tone in continuous or gated format; The PWN1 – White Noise Only that is adjustable in output level for sound masking purposes – it has a built in speaker; The GLPN – Pink Noise only in a handy pocket sized connector body. FEATURES SPECIFICATIONS PN2W: OUTPUT: Unbalanced RCA jack, impedance 620 ohms Continuous Pink or OUTPUT LEVEL: Pink noise - Continuous @ 83dB - White Noise 85dB ref, 98dB SPL, 62mV Small Size White noise - Continuous @ 83dB - 85dB ref, 98dB SPL, Battery Powered 62mV Rugged Enclosure FREQUENCY RANGE: 20Hz - 20kHz POWER REQUIREMENTS: 9V battery SIZE (W x H x D); WEIGHT: 1-3/4" x 2-3/4" x 1-3/4"; 2 oz. CASE MATERIAL: High impact ABS; FRONT PANEL: Anodized Aluminum. PN2: OUTPUT: Unbalanced ¼" jack, impedance 620 ohms Continuous Pink Noise OUTPUT LEVEL: Continuous @ 83dB - 85dB ref; Small Size 97dB SPL, 55mV Battery Powered FREQUENCY RANGE: 20Hz - 20kHz Rugged Enclosure POWER REQUIREMENTS: 9V battery SIZE (W x H x D); WEIGHT: 1.75" x 2.75" x 1.75"; 2 oz. CASE MATERIAL: High impact ABS; FRONT PANEL: Anodized Aluminum. PN3A: OUTPUT: Unbalanced ¼" jack, impedance 620 ohms Continuous Pink Noise OUTPUT LEVEL: Continuous @ 95dB - 97dB ref, Burst Format 110dB SPL, 245mV Pulse Format RT60 burst: 11s Time Off Control STA (loudspeaker timing) pulse: 9ms Time off control: 10 - 150s FREQUENCY RANGE: 20Hz - 20kHz POWER REQUIREMENTS: 9 V battery SIZE (W x H x D); WEIGHT: 2½" x 4" x 1½"; 6 oz. CASE MATERIAL: High impact ABS. 1 C_glpn_7c15 PN3B: OUTPUT: Unbalanced ¼" jack, impedance 620 ohms Continuous Pink Noise GATE INPUT: 3.5mm mono jack 1 kHz Tone Generator OUTPUT LEVEL: Gate Function 95dB - 97dB ref, 110dB SPL, 245mV Duration of gated output is user controlled FREQUENCY RANGE: Pink Noise: 20Hz - 20kHz 1kHz: 1kHz Nominal POWER REQUIREMENTS: 9 V battery SIZE (W x H x D); WEIGHT: 2½" x 4" x 1½"; 6 oz. CASE MATERIAL: High impact ABS. PWN1: OUTPUT: Signal out - unbalanced ¼" jacks, impedance Continuous White Noise of 620 ohms. Built In Speaker OUTPUT LEVEL: Line output: -36dBu to +13dBu Level Control Speaker output: 30dBa SPL to 72dBa SPL @ 1 meter Line Output FREQUENCY RANGE: 25Hz - 20kHz Speaker Output POWER REQUIREMENTS: Internal: 9V battery. External: 12Vdc @ 200mA via 3.5mm jack (Model BE1 supplied). SIZE (W x H x D); WEIGHT: 3" x 5½" x 1.75"; 7 oz. CASE MATERIAL: High impact ABS. GLPN: OUTPUT: Unbalanced 3 pin XLR Male Continuous Pink Noise OUTPUT LEVEL: Continuous @ 24.5mV (-32.2dBV) Pocket Size FREQUENCY RANGE: 20Hz - 20kHz Phantom Powered POWER REQUIREMENTS: 12Vdc - 48Vdc phantom Rugged Enclosure power Red LED Indicator SIZE (W x H x D); WEIGHT: 2.75" x .75"; 2 oz CASE MATERIAL: Die cast body P.O. Box 500 West Redding, CT 06896 Tel: 203-938-2588 Fax: 203-938-8740 www.gold-line.com 2 C_glpn_7c15.