J&R Technology JR-TH-01 User manual

ACOUSTIC HOOD
JR-TH-01 ACOUSTIC HOOD
For external or internal use, the JR-TH-01 is
extremely robust and weatherproof.
Inside the hood's outer shell is a perforated
polypropylene lining that houses 50mm
nonhygroscopic acoustic insulation. The hood
is designed to attain a high level of noise
reduction of up to 23.9dB.
The hood is fixed to the wall via two stainless
steel mounting brackets that are secured
through the hood's back wall to the inner
telephone apparatus plate. This enables a load
of up to 60 kgs to be safely mounted on the
plate. The plate is pre-drilled to accept many
telephones.
Beneath the plate is a 304 stainless steel shelf,
white paint finish, with a cable entry slot
provided.
Specifications
Dimensions –H780mm W680mm D500mm
Weight - Approx 20Kg
Stock Colour - Yellow (RAL 1006), Others to order
Outer Shell - General Purpose Resin continuous filament mat - Fire Resistance to BS476 Part 7
Class 1 Surface Spread of Flame
304 Stainless Steel Shelf, powder coated orange
Acoustic Insulation - 50mm Tissue faced non hygroscopic Rockwool (RW3) density 60kg/m3
Insulation Liner - White Perforated Polypropylene 3mm thickness
Apparatus plate - 304 Grade Stainless Steel, 2mm thickness, powder coated white
Mounting Brackets –304 Grade Stainless Steel, 6mm thickness
Boxed Dimensions - 80 x 70 x 55cm
Boxed Weight - Approx. 30kg
Thank you for you purchasing J&R Acoustic
Hood, Please read this user manual carefully
before using this product and save this manual
for future use.

Installation drawing
INTRODUCTION - Important Safety Information
Noise Reduction
The JR-TH-01 acoustic hood was installed into the MIRA anechoic test chamber.
A calibrated sound source was positioned around the hood at the rear, left and
right faces at a distance of 0.7m from the face being assessed and at a height of
0.8m. A microphone was positioned inside the hood at a position consistent
with the location of the telephone. With the source operating, noise was
measured at the telephone position both with and without the hood in position.
The difference between these measurements, measured in octave bands, is the
insertion loss, i.e. the reduction in noise due to the effect of the kiosk. These
measurements were repeated for each source position. Insertion Loss Data
results are as follows:
(Measured using a 4kHz Octave Band dB)
Equipment included: Q1030 B&K Sound Source, Q25274 B& K Microphone,
Q22796 B&K Microphone, LMS Frontend, Q13432 Calibrator.
Contact Us
J&R Technology Limited
Build#1, Junhe Industrial Park,Dalang, Longhua Town,Baoan District, Shenzhen, China
Tel: [phone] Fax: [phone]
Sales enquiries: [e-mail] General enquiries: [e-mail]