Live Design Blog Archive
Rational Acoustics Debuts the Noise Stick

Rational Acoustics Debuts the Noise Stick

The Rational Acoustics Noise Stick(TM) phantom powered pink noise generator more-->more--> more--> MicrosoftInternetExplorer4 -->

Putnam, CT January 12, 2009 – Taking the “New” in “New Year” literally, Rational Acoustics LLC today announced the launch of its first acoustic test and measurement accessory product to be designed and distributed under the Rational Acoustics brand name.

The Rational Noise StickTM, our new phantom powered pink noise generator is a study in simplicity, precision and ruggedness. Its mission is to do one thing really well and do it faithfully for years to come. The Noise Stick requires no batteries and no configuration. It doesn't even have a power switch. Plug it into a phantom-powered microphone input and it generates pink noise - very nice, well-behaved pink noise. Unplug it and it stops.

The Noise Stick is hand built in the USA exclusively for Rational Acoustics by PMP Audio Works, sparing no detail for quality and reliability. It features such niceties as hand matched transistors, 1% tolerance resistors and a Linear Feedback Shift Register (LFSR) random number generator that provides a pseudorandom signal with excellent statistical properties and without any obvious, audible repeats. The output of the Noise Stick's random number generator drives a hand tuned filter bank that delivers a pink spectrum that is nominally flat within +/- 0.5 dB from 20 Hz to 20 kHz on a fractional-octave analyzer. The frequency response and output level for each unit is tested at both the beginning and end of the burn-in process to ensure that both criteria perform over time without variation.

We didn't skimp on the external features either. The sleek, compact design is unobtrusive and fits easily into mic cases and gear bags. The housing for the Noise Stick is milled from a solid piece of aluminum rod to yield a thicker walled tube than we could have gotten using standard tubing stock. The entire unit is filled with epoxy after assembly to protect the electronics from shock and increase its crush strength. Prototype test units were found to work just fine after being dropped from two stories onto a concrete surface and run over by a car, although we wouldn't recommend doing this to yours (on purpose).

The Noise Stick is available for purchase at the Rational Acoustics web store ( ) immediately.


Output Impedance: <200 Ohms, Balanced

Output Connector: Integrated 3-Pin XLR Male

Output Level: -60 dBu nominal

Frequency Range: 20 Hz - 20 kHz

Typical Flatness: +/- 0.5 dB from 20Hz to 20 kHz

Power Requirements: 12-48 V Phantom Power

Power Consumption: 4 milliamps

Size: 4.74” x 0.75” (119 x 19 mm)

Weight: 1.75 oz. (50 g)

Case Material: Machined aluminum with clear anodized finish

Warranty: Three (3) years from date of purchase for defects in materials or workmanship


About Rational Acoustics LLC

Rational Acoustics is dedicated to making the world a better place to listen. We support the advancement of the field of acoustic test and measurement and system alignment through education, product development and community support.

For more information, please visit

About PMP Audio Works

PMP Audio Works designs and hand-builds an eclectic range of professional audio recording and test equipment in the USA. Our diligent approach to design and handcrafted production ensure outstanding products, while our reliable customer service and friendly, honest advice ensure an outstanding customer experience.

For more information, please visit

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.