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 |