Radio Shack Sound Level Meter Owner's Manual

O

P

Sound Level Meter

wner’s Manual

lease read before using this equipment.

 Contents

Introduction ......................................... 3

Specifications ...................................... 5

Installing a Battery .............................. 7

Controls ................................................ 9

Range ............................................ 9

Output .......................................... 10

Response ..................................... 10

Weighting ..................................... 11

Microphone .................................. 12

Tripod Adapter ............................. 12

Cal (Calibration) ........................... 13

Measurements ............................. 13

Checking Noise Levels ................. 16

Checking Room Acoustics ........... 17

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by RadioShack Corporation.

2

 Introduction

Your RadioShack Sound Level Meter is
an extremely versatile device for measur­ing sound intensity in just about an acous­tic environment — loud or soft; high­pitched, low-pitched, or broad-band; inter­mittent or continuous. Your meter features
a large, easy-to-read indicator for taking
quick measurements. The meter uses a
9V battery (not supplied) which allows you
to use it anywhere.

Note: This meter should be used for
home/hobbyist use only. This meter does
not meet the requirements set forth by the
American National Standards Institute
(ANSI), Standard S1.4.

The meter’s other features include:
Seven Sound-level Ranges — allow

measurements form 50–126 dB (refer­enced to 0.0002 µbar).

A And C Weightings — lets you check
compliance with safety regulations and
make an acoustic analysis.

Slow And Fast Response Settings — let
you check peak and average noise levels.

Introduction

3

Built-in Battery Condition Indicator —
lets you check the battery condition.

Phono-type Output Jack — for connec­tion to home theater or test equipment.

Threaded Insert — lets you attach the
meter to a camera tripod for increased ac­curacy.

4

Introduction

 Specifications

Range:

Switch Setting Range of Measurement

60 dB 50–66 dB
70 dB 60–76 dB
80 dB 70–86 dB

90 dB 80–96 dB
100 dB 90–106 dB
110 dB 100–116 dB
120 dB 110–126 dB

Accuracy ... ................ ... .. ....... ± 2 dB @ 114 dB

S tandard ........................... 0 dB = 0.0002 µbar

Weighting ........................................... A and C

Response .............................. ... .. Fast and Slo w

Signal Output ................................. 1.0V (peak)

minimum into open circuit,

with full-scale meter,

deflection at 1 kHz

Load Impedance .................10k Ohm minimum

Distortion ............ Less than 2% at 1 kHz, 0.5V

Microphone ........................ Electret condenser

omnidirectional becoming

slightly directional

with increase in frequency

Specifications

5

Battery ................................................. One 9V

Battery Check ................ Tests “good” from 7.0

to 10.5V

Expected Battery Life ......... 110 working hours

(alkaline battery)

Size (HWD) .............. 5

1

/16 × 25/8 × 13/8 Inches

(130 × 68 × 36 mm)

Weight .............. ... ................ ... ............. 4.23 oz

(120 g)

Specifications are typical; individual units might
vary. Specifications are subject to change and
improvement without notice.

6

Specifications