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PA System Range Tables


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Below are tables listing the maximum loudness (Sound Pressure Level – SPL) of Technomad PA systems at different listening distances.
Note that YOUR system’s actual max SPL is highly dependent on the type and recording /speaking quality of audio being played, correct system setup and operation etc. These should be viewed as best-case approximate values. Note also that SPL is only part of the picture – a highly distorted horn-based system might have higher SPL numbers than a Technomad system, but be completely unintelligible. Technomad systems generally are easier to understand than other products even at LOWER SPL levels, and they are better at ‘cutting through’ background noise than narrow-bandwidth horns. Click here to see some typical environmental SPL levels for comparison.

Table 1 – “Peak” SPL Values
(short duration maximum volume operation, i.e. brief sirens and announcements)

Distance (M) Distance
(Ft)
Volume (SPL) of Vienna-speaker based
systems: iPA1, mPA1, Scoreboard1
Volume (SPL) of Noho-speaker based
systems: iPA2, mPA2, Scoreboard2
Volume (SPL) of Berlin-speaker based
systems: iPA3, mPA3, Scoreboard3
1
3
116 dB
126.5 dB 129.5 dB
10
33
96 dB
106.5 dB 109.5 dB
50
164
82 dB
92.5 dB 95.5 dB
75
246
78 dB
89 dB 92 dB
100
328
76 dB
86.5 dB 89.5 dB
250
820
68 dB
78.5 dB 81.5 dB
500
1640
62 dB
72.5 dB 75.5 dB
804
2638
58 dB
68.4 dB 71.4 dB
1207
3960
64.9 dB 67.9 dB
1609.3
5280
62.4 dB 65.4 d

Table 2 – “Continuous” SPL Values (continuous speech or music playback)

Distance (M) Distance (Ft) Volume (SPL) of Vienna-speaker based
systems: iPA1, mPA1
, Scoreboard1
Volume (SPL) of Noho-speaker based
systems: iPA2, mPA2, Scoreboard2
Volume (SPL) of Berlin-speaker based
systems: iPA3, mPA3, Scoreboard3
1
3
113 dB
124 dB 126.5 dB
10
33
93 dB
104 dB 106.5 dB
50
164
79 dB
90 dB 92.5 dB
75
246
75 dB
86.5 dB 89 dB
100
328
73 dB
84 dB 86.5 dB
250
820
65 dB
76 dB 78.5 dB
500
1640
59 dB
70 dB 72.5 dB
804
2638
55 dB
65.9 dB 68.4 dB
1207
3960
62.4 dB 64.9 dB
1609.3
5280
59.9 dB 62.4 dB

Typical Environmental Sound Levels (for comparison)

Sounds SPL
Rocket Launching 180 dB
Jet Engine 140 dB
Thunderclap, Air Raid Siren 1 Meter 130 dB
Jet takeoff (200 ft) 120 dB
Rock Concert, Discotheque 110 dB
Firecrackers, Subway Train 100 dB
Heavy Truck (15 Meter), City Traffic 90 dB
Alarm Clock (1 Meter), Hair Dryer 80 dB
Noisy Restaurant, Business Office 70 dB
Air Conditioning Unit, Conversational Speech 60 dB
Light Traffic (50 Meter), Average Home 50 dB
Living Room, Quiet Office 40 dB
Library, Soft Whisper (5 Meter) 30 dB
Broadcasting Studio, Rustling Leaves 20 dB
Hearing Threshold 4 dB